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<ead xsi:schemaLocation="urn:isbn:1-931666-22-9 http://www.loc.gov/ead/ead.xsd" xmlns:ns2="http://www.w3.org/1999/xlink" xmlns="urn:isbn:1-931666-22-9" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <eadheader findaidstatus="Completed" repositoryencoding="iso15511" countryencoding="iso3166-1" dateencoding="iso8601" langencoding="iso639-2b">
        <eadid url="https://library.osu.edu/finding-aids/ead/UA/RG.27.B.1.xml">2016-12-21</eadid>
        <filedesc>
            <titlestmt>
                <titleproper>Guide to the Ohio State University, Perkins Observatory Records, 1935-1997
                    <num>RG.27.B.1</num>
                </titleproper>
                <author>Finding aid prepared by Zoe MacLeod</author>
            </titlestmt>
            <publicationstmt>
                <publisher>Ohio State University Libraries Special Collections</publisher>
                <address>
                    <addressline>1858 Neil Avenue</addressline>
                    <addressline>Columbus, OH, 43210</addressline>
                </address>
                <date>2016 December</date>
            </publicationstmt>
        </filedesc>
        <profiledesc>
            <creation>This finding aid was produced using the Archivists' Toolkit
                <date>2021-05-04T09:53-0400</date>
            </creation>
            <langusage>English</langusage>
            <descrules>Describing Archives: A Content Standard</descrules>
        </profiledesc>
    </eadheader>
    <archdesc level="recordgrp">
        <did>
            <unittitle>Ohio State University, Perkins Observatory Records</unittitle>
            <unitid>RG.27.B.1</unitid>
            <repository>
                <corpname>Ohio State University Libraries Special Collections</corpname>
            </repository>
            <langmaterial>
                <language langcode="eng"/>
            </langmaterial>
            <physdesc>
                <extent>1.4 Cubic feet</extent>
            </physdesc>
            <unitdate>1935-1997</unitdate>
            <abstract id="ref2" label="Abstract">The Perkins Observatory, located in Delaware, Ohio, opened in 1935 and is jointly owned by Ohio State University and Ohio Wesleyan University and is used for astronomical research. The Ohio State University, Perkins Observatory Records contains an inventory of the contents of the Perkins Observatory library and publications from the observatory; materials date from 1935 to 1997.</abstract>
            <physdesc id="ref3" label="Physical Description">(70) letter file folders</physdesc>
            <origination label="creator">
                <corpname rules="rda" source="naf">Perkins Observatory</corpname>
            </origination>
        </did>
        <arrangement id="ref4">
            <head>Arrangement of Materials</head>
            <p>Materials are arranged in the order received.</p>
        </arrangement>
        <acqinfo id="ref5">
            <head>Acquisitions Information</head>
            <p>Accession Number UA.1988.0171: Department of Astronomy, 2014 May; Accession Number UA.1988.0178</p>
        </acqinfo>
        <prefercite id="ref6">
            <head>Preferred Citation</head>
            <p>[identification of item], Ohio State University, Perkins Observatory Records, RG 27.B.1, Ohio State University Archives, Ohio State University</p>
        </prefercite>
        <accessrestrict id="ref7">
            <head>Access to Materials</head>
            <p>Materials in this collection are available for patron research, but may be used only in the University Archives Reading Room. Some materials in this collection may be stored off-site, and are only available if requested 72 hours in advance of your visit. Contact the University Archives for more information.</p>
        </accessrestrict>
        <userestrict id="ref8">
            <head>Use of Materials</head>
            <p>Materials in this collection may be protected by copyright, and are made available for research and educational purposes. In general, the OSU Libraries do not own the copyright for materials from our collections and cannot grant copyright permissions for these materials. The user is responsible for making a final determination of copyright status. If copyright protection applies, permission must be obtained from the copyright holder to reuse, publish, or reproduce the work beyond the bounds of fair use or other exceptions to the law. Works in the public domain are not protected by copyright and do not require permission to use.</p>
        </userestrict>
        <bioghist id="ref9">
            <head>Historical Note</head>
            <p>The Perkins Observatory, located in Delaware, Ohio, opened in 1935 and is jointly owned by Ohio State University and Ohio Wesleyan University and is used for astronomical research. The observatory was named for Hiram Mills Perkins, who graduated from Ohio Wesleyan University in 1857. Perkins donated $200,000 to Ohio Wesleyan University to purchase a telescope. The observatory is used as a teaching tool and a research laboratory.</p>
        </bioghist>
        <scopecontent id="ref10">
            <head>Scope and Contents</head>
            <p>The Ohio State University, Perkins Observatory Records contain an inventory of the contents of the Perkins Observatory library and publications from the observatory; materials date from 1935 to 1997.</p>
        </scopecontent>
        <relatedmaterial id="ref11">
            <head>Related Materials</head>
            <list type="deflist">
                <defitem>
                    <label>Ohio State University Archives Subject File</label>
                    <item>Perkins Observatory</item>
                </defitem>
            </list>
        </relatedmaterial>
        <controlaccess>
            <corpname rules="rda" source="naf">Ohio State University--History</corpname>
            <corpname rules="rda" source="naf">Perkins Observatory</corpname>
            <subject source="lcsh">Astronomy--Study and teaching (Higher)--Ohio--Columbus--20th century</subject>
            <subject source="lcsh">Libraries--Inventories--20th century</subject>
        </controlaccess>
        <dsc>
            <c01 id="ref13" level="series">
                <did>
                    <unittitle>Accession Number UA.1988.0171</unittitle>
                    <physdesc>
                        <extent>0.02 Cubic feet</extent>
                    </physdesc>
                    <unitdate>1935</unitdate>
                    <physdesc id="ref15" label="Physical Description">(1) letter file folder</physdesc>
                </did>
                <c02 id="ref16" level="file">
                    <did>
                        <unittitle>Inventory of the contents of the Perkins Observatory Library</unittitle>
                        <container id="cid4439001" type="Box" label="Mixed materials">Small Accessions 9</container>
                        <unitdate>1935</unitdate>
                    </did>
                </c02>
            </c01>
            <c01 id="ref17" level="series">
                <did>
                    <unittitle>Publications</unittitle>
                    <physdesc>
                        <extent>1.38 Cubic feet</extent>
                    </physdesc>
                    <unitdate>1935-1997</unitdate>
                    <physdesc id="ref87" label="Physical Description">(69) letter file folders</physdesc>
                </did>
                <c02 id="ref18" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory: "The Distribution of Electron Pressure in the Solar Photosphere"</unittitle>
                        <container id="cid13639019" type="Box" label="Mixed materials">UA.RG.27.PUB.0001</container>
                        <unitdate>1958 November 11</unitdate>
                    </did>
                </c02>
                <c02 id="ref19" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, Number 6: "The Spectrum of Nova Lacertae, 1936"</unittitle>
                        <container id="cid13639020" type="Box" label="Mixed materials">UA.RG.27.PUB.0001</container>
                        <unitdate>1937</unitdate>
                    </did>
                </c02>
                <c02 id="ref20" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, No. 8: "Photometry of the G Band in Representative Stellar Spectra"</unittitle>
                        <container id="cid13639021" type="Box" label="Mixed materials">UA.RG.27.PUB.0001</container>
                        <unitdate>1937</unitdate>
                    </did>
                </c02>
                <c02 id="ref21" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, No. 10: "A Survey of Stars with Composite Spectra"</unittitle>
                        <container id="cid13639022" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1938</unitdate>
                    </did>
                </c02>
                <c02 id="ref22" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, No. 11: "An Investigation of the Spectrum of Gamma Cassipeiae in the Visual Region"; Series 1, No. 12: "Spectrum of Gamma Cassiopeiae in the Region of the Paschen Series Limit"</unittitle>
                        <container id="cid13639023" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1939</unitdate>
                    </did>
                </c02>
                <c02 id="ref23" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, Number 13: "Eighteenth Magnitude Star-Counts and the Gaiactic Structure in Cygnus"</unittitle>
                        <container id="cid13639024" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1939</unitdate>
                    </did>
                </c02>
                <c02 id="ref24" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, No. 14: "A Study of the Spectroscopic Variable Persel"</unittitle>
                        <container id="cid13639025" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1940</unitdate>
                    </did>
                </c02>
                <c02 id="ref25" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, No. 15: "Investigations of the Brightness of Comets Part I"</unittitle>
                        <container id="cid13639026" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1941</unitdate>
                    </did>
                </c02>
                <c02 id="ref26" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, No. 16: "Investigations of the Brightness of Comets Part II"</unittitle>
                        <container id="cid13639027" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1942</unitdate>
                    </did>
                </c02>
                <c02 id="ref27" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, No. 17: "Magnitudes and Colors in the Globular Cluster Messler 12 and Selected Area 108"</unittitle>
                        <container id="cid13639028" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1942</unitdate>
                    </did>
                </c02>
                <c02 id="ref28" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, No. 18: "The Composite Spectrum of Tauri"</unittitle>
                        <container id="cid13639029" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1942</unitdate>
                    </did>
                </c02>
                <c02 id="ref29" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, No. 19: "On Systematic Errors in the Photometry of Comets"</unittitle>
                        <container id="cid13639030" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1943</unitdate>
                    </did>
                </c02>
                <c02 id="ref30" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, No. 20: "On the Spectrum of Comet 1940 c."</unittitle>
                        <container id="cid13639031" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1944</unitdate>
                    </did>
                </c02>
                <c02 id="ref31" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, No. 21: "The Helium Anomaly in Persel"</unittitle>
                        <container id="cid13639032" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1944</unitdate>
                    </did>
                </c02>
                <c02 id="ref32" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, No. 22: "The Use of Infrared Spectra for the Determination of Absolute Magnitude"; No. 23: "The Presence of Strong Line of OI in the Infrared Spectrum of W Cephel"</unittitle>
                        <container id="cid13639033" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1945</unitdate>
                    </did>
                </c02>
                <c02 id="ref33" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, No. 24: "The Infrared Spectrum of P Cassiopeiae in 1946"</unittitle>
                        <container id="cid13639034" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1947</unitdate>
                    </did>
                </c02>
                <c02 id="ref34" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, No. 25: "On the Occurence of Lanthanum Oxide in S-Type Stars"</unittitle>
                        <container id="cid13639035" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1948</unitdate>
                    </did>
                </c02>
                <c02 id="ref35" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, No. 26: "Neutral Oxygen in Stellar Atmospheres"</unittitle>
                        <container id="cid13639036" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1950</unitdate>
                    </did>
                </c02>
                <c02 id="ref36" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, No. 27: "The Spectra of R Andromedae (Maximum) and Mu Cephel Between 7400 and 8800 A</unittitle>
                        <container id="cid13639037" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1951</unitdate>
                    </did>
                </c02>
                <c02 id="ref37" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, No. 28: "On the Stellar Dynamics of Spherical Galaxies"</unittitle>
                        <container id="cid13639038" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1951</unitdate>
                    </did>
                </c02>
                <c02 id="ref38" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, No. 29: "Lines of Neutral Oxygen in the Infrared Spectra of Be Stars, Lines of Neutral Oxygen in the Infrared Spectra of Peculiar A Stars"</unittitle>
                        <container id="cid13639039" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1951</unitdate>
                    </did>
                </c02>
                <c02 id="ref39" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, No. 30: "HD 26 - An Unusual High-Velocity Star"</unittitle>
                        <container id="cid13639040" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1951</unitdate>
                    </did>
                </c02>
                <c02 id="ref40" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, No. 31: "A Photoelectric Study of the Eclipsing Stars RS Canom Venaticorum and YY Sagittari"</unittitle>
                        <container id="cid13639041" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1951</unitdate>
                    </did>
                </c02>
                <c02 id="ref41" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, No. 32: "An Infrared System of Brands of VO in M-Type Start"</unittitle>
                        <container id="cid13639042" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1952</unitdate>
                    </did>
                </c02>
                <c02 id="ref42" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, No. 33: "The Shell Spectrum of Omicron Andromedae the Spectrum of 29 Cygni the Spectrum of the High-Velocity A-Type Star HD 161817"</unittitle>
                        <container id="cid13639043" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1952</unitdate>
                    </did>
                </c02>
                <c02 id="ref43" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, No. 34: "Spectral Classification of the High-Velocity Stars"</unittitle>
                        <container id="cid13639044" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1953</unitdate>
                    </did>
                </c02>
                <c02 id="ref44" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, No. 35: "Tabulation of the Incomplete Fermi-Dirac Functions"</unittitle>
                        <container id="cid13639045" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1953</unitdate>
                    </did>
                </c02>
                <c02 id="ref45" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, No. 36: "The Effect of Electron Screening on Thermonuclear Energy Generation"</unittitle>
                        <container id="cid13639046" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1953</unitdate>
                    </did>
                </c02>
                <c02 id="ref46" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, No. 37: "The Spectra and Rotational Velocities of the Bright Stars of Draper Types B8-A2"</unittitle>
                        <container id="cid13639047" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1952</unitdate>
                    </did>
                </c02>
                <c02 id="ref47" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, No. 38: "Recent Changes in teh Spectra of Four Be Stars"</unittitle>
                        <container id="cid13639048" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1954</unitdate>
                    </did>
                </c02>
                <c02 id="ref48" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, No. 39: "Classification of the S-Type Stars"</unittitle>
                        <container id="cid13639049" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1955</unitdate>
                    </did>
                </c02>
                <c02 id="ref49" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, No. 41: "The Spectra and Rotational Velocities of the Bright Stars of Draper Types A3-G0"</unittitle>
                        <container id="cid13639050" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1955</unitdate>
                    </did>
                </c02>
                <c02 id="ref50" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, No. 42: "A Table of the Radiative Opacities of a Number of Gas Mixtures"</unittitle>
                        <container id="cid13642001" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1955</unitdate>
                    </did>
                </c02>
                <c02 id="ref51" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, No. 43: "Line Broadening in the Spectra of O- and Early B- Types Stars"</unittitle>
                        <container id="cid13642002" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1956</unitdate>
                    </did>
                </c02>
                <c02 id="ref52" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory Series 1, No. 44: "Radial Velocities of Nine S-Types Stars"</unittitle>
                        <container id="cid13642003" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1956</unitdate>
                    </did>
                </c02>
                <c02 id="ref53" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, No. 45: "The Red Spectrum of Fu Monocerotis"</unittitle>
                        <container id="cid13642004" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1956</unitdate>
                    </did>
                </c02>
                <c02 id="ref54" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, No. 47: "Stellar Spectra in the Red and Near Infrared"</unittitle>
                        <container id="cid13642005" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1957</unitdate>
                    </did>
                </c02>
                <c02 id="ref55" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, No. 48: "A Search for Cepheids in Galactic Clusters"</unittitle>
                        <container id="cid13642006" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1957</unitdate>
                    </did>
                </c02>
                <c02 id="ref56" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, No. 49: "Interstellar Gas and Star Creation"</unittitle>
                        <container id="cid13642007" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1957</unitdate>
                    </did>
                </c02>
                <c02 id="ref57" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, No. 50: "Abundances of Metals, CN, and CH is Giant Stars"</unittitle>
                        <container id="cid13642008" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1958</unitdate>
                    </did>
                </c02>
                <c02 id="ref58" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, No. 52: "The Spectrum of TY Virginis, A High Velocity Variable Star"</unittitle>
                        <container id="cid13642009" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1958</unitdate>
                    </did>
                </c02>
                <c02 id="ref59" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, No. 53: "Old Galactic Clusters"</unittitle>
                        <container id="cid13642010" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1958</unitdate>
                    </did>
                </c02>
                <c02 id="ref60" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, No. 54: "Peculiar and Metallic-Line A-Type Stars in a Galactic Zone"</unittitle>
                        <container id="cid13642011" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1959</unitdate>
                    </did>
                </c02>
                <c02 id="ref61" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, No. 55: "The Absorption Coefficient of the Negative Hydrogen Ion"</unittitle>
                        <container id="cid13642012" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1959</unitdate>
                    </did>
                </c02>
                <c02 id="ref62" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 1, No. 61: "Absorption Spectra of M-Type Mira Variables"</unittitle>
                        <container id="cid13642013" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1962</unitdate>
                    </did>
                </c02>
                <c02 id="ref63" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 2, No. 1: "Astronomical 'Seeing' and its Relation to Atmospheric Turbelence"</unittitle>
                        <container id="cid13642014" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1953 July </unitdate>
                    </did>
                </c02>
                <c02 id="ref64" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 2, No. 2: "Experimental Verification of a Recently Proposed Theory of Astronomical Seeing"</unittitle>
                        <container id="cid13642015" type="Box" label="Mixed materials">UA.RG.27.PUB.0002</container>
                        <unitdate>1954 April </unitdate>
                    </did>
                </c02>
                <c02 id="ref65" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 2, No. 3: "Comparisons of Stellar Scintillation with Image Motion"</unittitle>
                        <container id="cid13642016" type="Box" label="Mixed materials">UA.RG.27.PUB.0003</container>
                        <unitdate>1954 April </unitdate>
                    </did>
                </c02>
                <c02 id="ref66" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 2, No. 5-6: "Relation Between the Structure of Stellar Shadow Band Patterns and Stellar Scintillation"; "Determinations of Shadow Band Structure from Stellar Scintillation Measurements"</unittitle>
                        <container id="cid13642017" type="Box" label="Mixed materials">UA.RG.27.PUB.0003</container>
                        <unitdate>1955</unitdate>
                    </did>
                </c02>
                <c02 id="ref67" level="file">
                    <did>
                        <unittitle>Contributions from the Perkins Observatory, Series 2, No. 7: "Astronomical Scintillation and Atmosphere Turbulence"</unittitle>
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                        <unitdate>1956</unitdate>
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                        <unittitle>Contributions from the Perkins Observatory, Series 2, No. 8: "Direct Observation of Element Motion in Stellar Shadow Patterns"</unittitle>
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                        <unitdate>1956</unitdate>
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                        <unittitle>Contributions from the Perkins Observatory, Series 2, No. 9: "RR Lyrae Stars and Galactic Structures"</unittitle>
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                        <unitdate>1957 April </unitdate>
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                        <unittitle>Contributions from the Perkins Observatory, Series 2, No. 10: "A List of Stars with Common Proper Motions"</unittitle>
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                        <unitdate>1958 January </unitdate>
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                        <unittitle>Contributions from the Perkins Observatory, Series 2, No. 11: "The Frequency of Supernovae in Galaxies of Different Types"</unittitle>
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                        <unitdate>1959</unitdate>
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                        <unittitle>Contributions from the Perkins Observatory: table of contents for series/Volume 1, No. 1-13</unittitle>
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                        <unitdate>1935-1939</unitdate>
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                        <unittitle>General information booklet</unittitle>
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                        <unitdate>1945</unitdate>
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                        <unitdate>1948</unitdate>
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                        <unitdate>1951</unitdate>
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                        <unitdate>1959 February </unitdate>
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                        <unittitle>Public Education Services brochures</unittitle>
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                        <unitdate>1965 June 1-1971 May 31</unitdate>
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            </c01>
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