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      <eadid mainagencycode="dlc" countrycode="us" identifier="hdl:loc.mss/eadmss.ms998006" encodinganalog="856$u">http://hdl.loc.gov/loc.mss/eadmss.ms998006</eadid>
      <filedesc>
         <titlestmt>
            <titleproper type="245$a">Lee De Forest</titleproper>
            <subtitle>A Register of His Papers in the Library of
			 Congress</subtitle>
            <author encodinganalog="245$c">Prepared by Manuscript Division staff
			 <lb/>Revised by Harry G. Heiss</author>
         </titlestmt>
         <publicationstmt>
            <publisher encodinganalog="260$b">
               <extptr href="lcseal" show="embed" actuate="onload"/>Manuscript Division, Library of
			 Congress</publisher>
            <address>
               <addressline>Washington, D.C. </addressline>
            </address>
            <date normal="1997" encodinganalog="260$c">1997</date>
         </publicationstmt>
         <notestmt>
            <note>
               <p>Contact information: 
				<extref href="http://lcweb.loc.gov/rr/mss/address.html" show="new" actuate="onrequest">http://lcweb.loc.gov/rr/mss/address.html</extref> 
               </p>
            </note>
         </notestmt>
      </filedesc>
      <profiledesc>
         <creation>Text converted and initial EAD tagging provided by Apex Data
		  Services, 
		  <date normal="1999-01">1999 January;</date> encoding completed by
		  Manuscript Division, 
		  <date normal="1999">1999</date>
         </creation>
         <langusage>Finding aid written in <language encodinganalog="041">English.</language>
         </langusage>
      </profiledesc>
      <revisiondesc>
         <change encodinganalog="583">
            <date normal="2004-12-01">2004-12-01</date>
            <item>converted from EAD 1.0 to EAD 2002 </item>
         </change>
      </revisiondesc>
   </eadheader>
   <archdesc type="register" level="collection">
      <did>
         <head>Collection Summary</head>
         <unittitle label="Title" encodinganalog="245$a">Papers of Lee De Forest 
		  <unitdate label="Span Dates" type="inclusive" encodinganalog="245$f" normal="1884/1955">1884-1955</unitdate> 
         </unittitle>
         <unitid label="ID No." encodinganalog="590" countrycode="US" repositorycode="DLC">MSS18168</unitid>
         <origination label="Creator"> 
		  
            <persname source="lcnaf" encodinganalog="100">De Forest, Lee,
			 1873-1961</persname> 
         </origination>
         <physdesc label="Extent">
            <extent encodinganalog="300">375
		  items</extent>
            <extent encodinganalog="300">4 containers</extent>
            <extent encodinganalog="300">1.6 linear feet</extent>
            <extent encodinganalog="300">2
		  microfilm reels</extent>
         </physdesc>
         <langmaterial label="Language">Collection material in <language encodinganalog="041" langcode="eng">English.</language>
         </langmaterial>
         <repository label="Repository" encodinganalog="852"> 
		  
            <corpname>
               <subarea>Manuscript Division</subarea> Library of
			 Congress</corpname>
		  
            <address>
               <addressline>Washington, D.C.</addressline>
            </address>
         </repository>
         <abstract label="Abstract" encodinganalog="520$a">Radio pioneer and
		  inventor. Correspondence, diaries, technical notes and other material relating
		  to Lee De Forest's inventions in radio and electronics and their effect in
		  sound recording and transmission, efforts to exploit his discoveries through
		  various business ventures, and his competition with Guglielmo Marconi in the
		  field of wireless communication. </abstract>
      </did>
      <controlaccess>
         <head>Selected Search Terms</head>
         <note>
            <p>The following terms have been used to index the description of this
			 collection in the Library's online catalog. They are grouped by name of person
			 or organization, by subject or location, and by occupation and listed
			 alphabetically therein.</p>
         </note>
         <controlaccess>
            <head>Names:</head>
            <persname source="lcnaf" encodinganalog="100" role="creator">De Forest,
			 Lee, 1873-1961</persname>
            <persname source="lcnaf" encodinganalog="600" role="subject">Marconi,
			 Guglielmo, marchese, 1874-1937</persname>
            <corpname source="lcnaf" encodinganalog="610" role="subject">Yale
			 University--Students</corpname>
         </controlaccess>
         <controlaccess>
            <head>Subjects:</head>
            <subject source="lcsh" encodinganalog="650">Electronics</subject>
            <subject source="lcsh" encodinganalog="650">Inventions</subject>
            <subject source="lcsh" encodinganalog="650">Preparatory
			 schools</subject>
            <subject source="lcsh" encodinganalog="650">Radio</subject>
            <subject source="lcsh" encodinganalog="650">Sound--Recording and
			 reproducing</subject>
            <subject source="lcsh" encodinganalog="650">Sound--Transmission</subject>
            <subject source="lcsh" encodinganalog="650">Wireless communication
			 systems</subject>
         </controlaccess>
         <controlaccess>
            <head>Occupations:</head>
            <occupation source="itoamc" encodinganalog="656">Inventors</occupation>
            <occupation source="itoamc" encodinganalog="656">Radio pioneers</occupation>
         </controlaccess>
      </controlaccess>
      <descgrp type="admininfo">
         <head>Administrative Information</head>
         <acqinfo encodinganalog="541">
            <head>Provenance:</head>
            <p>The papers of Lee De Forest, radio pioneer and inventor, were given
			 to the Library of Congress by De Forest in 1955.</p>
         </acqinfo>
         <processinfo encodinganalog="583">
            <head>Processing History:</head>
            <p>The papers of Lee De Forest were arranged and described in 1955. The
			 description was revised in 1997.</p>
         </processinfo>
         <userestrict encodinganalog="540">
            <head>Copyright Status:</head>
            <p>The status of copyright in the unpublished writings of Lee De Forest
			 is governed by the Copyright Law of the United States (Title 17, U.S.C.).</p>
         </userestrict>
         <altformavail encodinganalog="530">
            <head>Microfilm:</head>
            <p>A microfilm edition of part of these papers is available on two reels.  Consult a reference librarian in the Manuscript Division concerning availability for purchase or interlibrary loan.</p>
         </altformavail>
         <prefercite encodinganalog="524">
            <head>Preferred Citation:</head>
            <p>Researchers wishing to cite this collection should include the
			 following information: Container or reel number, Lee De Forest Papers,
			 Manuscript Division, Library of Congress, Washington, D.C.</p>
         </prefercite>
      </descgrp>
      <bioghist encodinganalog="545">
         <head>Biographical Note</head>
         <chronlist>
            <listhead>
               <head01>Date</head01>
               <head02>Event</head02>
            </listhead>
            <chronitem>
               <date>1873, Aug. 26</date>
               <event>Born, 
				<geogname>Council Bluffs, Iowa</geogname>
               </event>
            </chronitem>
            <chronitem>
               <date>1896</date>
               <event>Ph.B., 
				<corpname>Yale University,</corpname> 
				
                  <geogname>New Haven, Conn.</geogname>
               </event>
            </chronitem>
            <chronitem>
               <date>1899</date>
               <event>Ph.D., 
				<corpname>Yale University,</corpname> 
				
                  <geogname>New Haven, Conn.</geogname>
               </event>
            </chronitem>
            <chronitem>
               <date>1900</date>
               <eventgrp>
                  <event>Joined 
				  <corpname>Western Electric Co.</corpname>, 
				  <geogname>Chicago, Ill.</geogname> 
                  </event>
                  <event>Designed alternating current transmitter </event>
                  <event>Developed electrolytic receiver</event>
               </eventgrp>
            </chronitem>
            <chronitem>
               <date>1901</date>
               <event>Founded 
				<corpname>American De Forest Wireless Telegraph Co.</corpname>
				(later 
				<corpname>United Wireless Telegraph Co.</corpname>)</event>
            </chronitem>
            <chronitem>
               <date>1905</date>
               <event>Developed first model of audion amplifier</event>
            </chronitem>
            <chronitem>
               <date>1906</date>
               <eventgrp>
                  <event>Developed triode vacuum tube </event>
                  <event>Married 
				  <persname>Lucille Sheardown</persname> (divorced 1907)</event>
               </eventgrp>
            </chronitem>
            <chronitem>
               <date>1908</date>
               <event>Married 
				<persname>Nora Blatch</persname> (divorced 1911)</event>
            </chronitem>
            <chronitem>
               <date>1910</date>
               <event>Broadcast voice of 
				<persname>Enrico Caruso</persname> by radio from the 
				<corpname>Metropolitan Opera House,</corpname> 
				
                  <geogname>New York, N.Y.</geogname>
               </event>
            </chronitem>
            <chronitem>
               <date>1912</date>
               <eventgrp>
                  <event>Sold telephone repeater rights to 
				  <corpname>American Telephone and Telegraph Co.</corpname>, which
				  used his three electrode vacuum tube in first transcontinental telephony
				  </event>
                  <event>Married 
				  <persname>Mary Mayo</persname> (divorced 1930)</event>
               </eventgrp>
            </chronitem>
            <chronitem>
               <date>1913</date>
               <eventgrp>
                  <event>Demonstrated first oscillating audion tube </event>
                  <event>Became vice president, 
				  <corpname>Radio Telegraph Co.</corpname> 
                  </event>
                  <event>Became vice president, 
				  <corpname>De Forest Radio Co.</corpname>
                  </event>
               </eventgrp>
            </chronitem>
            <chronitem>
               <date>1916</date>
               <eventgrp>
                  <event>Made first radio news broadcast </event>
                  <event>Established radio broadcast station</event>
               </eventgrp>
            </chronitem>
            <chronitem>
               <date>1919</date>
               <event>Patented phonofilm device for making talking pictures</event>
            </chronitem>
            <chronitem>
               <date>ca. 1920</date>
               <event>Published 
				<bibref>
				  
                     <title render="italic">How to Set Up an Amateur Radio Receiving
					 Station</title> (New York, N.Y.: De Forest Radio Telephone and Telegraph Co. 32
				  pp.)</bibref>
               </event>
            </chronitem>
            <chronitem>
               <date>ca. 1922</date>
               <event>Published 
				<bibref>
				  
                     <title render="italic">Wireless in the Home</title> (New York,
				  N.Y.: De Forest Radio Telephone and Telegraph Co. 32 pp.)</bibref>
               </event>
            </chronitem>
            <chronitem>
               <date>1923</date>
               <eventgrp>
                  <event>Demonstrated sound on film at 
				  <corpname>Rivoli Theater</corpname>, 
				  <geogname>New York, N.Y.</geogname> 
                  </event>
                  <event>Organized 
				  <corpname>De Forest Phonofilm Co.</corpname>
                  </event>
               </eventgrp>
            </chronitem>
            <chronitem>
               <date>1926</date>
               <event>D.Sc., 
				<corpname>Yale University</corpname>, New Haven, Conn.</event>
            </chronitem>
            <chronitem>
               <date>1930</date>
               <event>Married 
				<persname>Marie Mosquini</persname>
               </event>
            </chronitem>
            <chronitem>
               <date>1934</date>
               <event>Established 
				<corpname>Lee De Forest, Inc.,</corpname>
				
                  <geogname> Los Angeles, Calif.</geogname>
               </event>
            </chronitem>
            <chronitem>
               <date>1942</date>
               <event>Published 
				<bibref>
				  
                     <title render="italic">Television, Today and Tomorrow</title>
				  (New York, N.Y.: Dial Press. 361 pp.)</bibref>
               </event>
            </chronitem>
            <chronitem>
               <date>1947</date>
               <event>Edison Medal of the 
				<corpname>American Institute of Electrical
				  Engineers</corpname>
               </event>
            </chronitem>
            <chronitem>
               <date>1950</date>
               <event>Published 
				<bibref>
				  
                     <title render="italic">Father of Radio</title> (Chicago, Ill.:
				  Wilcox and Fallett. 502 pp.)</bibref>
               </event>
            </chronitem>
            <chronitem>
               <date>1951</date>
               <event>Vice president, 
				<corpname>National Association for Better Radio and
				  Television</corpname>
               </event>
            </chronitem>
            <chronitem>
               <date>1961, June 30</date>
               <event>Died, 
				<geogname>Hollywood, Calif.</geogname>
               </event>
            </chronitem>
         </chronlist>
      </bioghist>
      <scopecontent encodinganalog="520">
         <head>Scope and Content Note</head>
         <p>The papers of 
		  <persname>Lee De Forest (1873-1961)</persname> span the years 1884-1955
		  and include biographical sketches, booklets, correspondence, diaries, drawings,
		  essays, newspaper and magazine clippings, photographs, poetry, and research
		  notes. De Forest was a pioneer in wireless communications who made possible the
		  long distance transmission and reception of the human voice, which led to the
		  foundation of the radio industry and long distance telephone communication. His
		  inventions, particularly the audion amplifier in 1905, the triode vacuum tube
		  in 1906, and the oscillating audion in 1913, revolutionized wireless
		  communications and earned him the title, “the father of radio.” De
		  Forest also perfected the phonofilm method of sound recording and the
		  glow-light recording of sound films, made important contributions to the
		  development of television and high speed facsimile transmission, and invented
		  radio therapy and the radio knife.</p>
         <p>The collection contains letters from De Forest to members of his
		  family, friends, and business associates, with only a few to fellow scientists.
		  The correspondence is arranged chronologically. A subject file contains
		  biographical material on De Forest, published and manuscript scientific
		  writings, photographs of early audion tubes, and technical schematics,
		  sketches, and notes on several of De Forest's inventions. The subject file is
		  arranged alphabetically by type of material.</p>
         <p>De Forest's diaries, or notebook journals, span the years 1891-1949
		  and contain references to the difficulties encountered in the early years of
		  his career as he struggled for recognition in the face of persistent lack of
		  funds and inconstant friends. There are frequent allusions to his inventions
		  and business ventures, both successes and failures, descriptions of the natural
		  world, and original poetry. The diaries are arranged chronologically and have
		  been microfilmed.</p>
      </scopecontent>
      <dsc type="in-depth">
         <head>Container List</head>
         <c01 level="file">
            <did>
               <container type="box">1</container>
               <unittitle encodinganalog="245$a">Correspondence, 
				<unitdate type="inclusive" encodinganalog="245$f">1884-1950,
				  n.d.</unitdate> 
               </unittitle>
               <physdesc>
                  <extent encodinganalog="300">(29
				folders)</extent>
               </physdesc>
            </did>
         </c01>
         <c01 level="file">
            <did>
               <container type="box">2</container>
               <unittitle encodinganalog="245$a">Subject file</unittitle>
            </did>
            <c02 level="file">
               <did>
                  <unittitle encodinganalog="245$a">Clippings, 
				  <unitdate type="inclusive" encodinganalog="245$f">1890-1953,
					 n.d.</unitdate> 
                  </unittitle>
                  <physdesc>
                     <extent encodinganalog="300">(2
				  folders)</extent>
                  </physdesc>
               </did>
            </c02>
            <c02 level="file">
               <did>
                  <unittitle encodinganalog="245$a">La Lumière
				  Électrique, 
				  <unitdate type="inclusive" encodinganalog="245$f">1911</unitdate>
				  
                  </unittitle>
               </did>
            </c02>
            <c02 level="file">
               <did>
                  <unittitle encodinganalog="245$a">Photographs</unittitle>
               </did>
               <c03 level="file">
                  <did>
                     <unittitle encodinganalog="245$a">Early audions, 
					 <unitdate type="inclusive" encodinganalog="245$f">n.d.</unitdate> 
                     </unittitle>
                  </did>
               </c03>
               <c03 level="file">
                  <did>
                     <unittitle encodinganalog="245$a">Personal, 
					 <unitdate type="inclusive" encodinganalog="245$f">n.d.</unitdate> 
                     </unittitle>
                  </did>
               </c03>
            </c02>
            <c02 level="file">
               <did>
                  <unittitle encodinganalog="245$a">Printed matter, 
				  <unitdate type="inclusive" encodinganalog="245$f">1904-1950,
					 n.d.</unitdate> 
                  </unittitle>
               </did>
            </c02>
            <c02 level="file">
               <did>
                  <unittitle encodinganalog="245$a">Schematics, sketches, and
				  technical notes, 
				  <unitdate type="inclusive" encodinganalog="245$f">1910-1911,
					 n.d.</unitdate> 
                  </unittitle>
                  <physdesc>
                     <extent encodinganalog="300">(2
				  folders)</extent>
                  </physdesc>
               </did>
            </c02>
            <c02 level="file">
               <did>
                  <unittitle encodinganalog="245$a">Yale University, New Haven,
				  Conn., entrance examination, biographical sketch, and class book form, 
				  <unitdate type="inclusive" encodinganalog="245$f">1892-1937,
					 n.d.</unitdate> 
                  </unittitle>
               </did>
            </c02>
            <c02 level="file">
               <did>
                  <unittitle encodinganalog="245$a">Writings, 
				  <unitdate type="inclusive" encodinganalog="245$f">1896-1955,
					 n.d.</unitdate> 
                  </unittitle>
               </did>
            </c02>
         </c01>
         <c01 level="file">
            <did>
               <unittitle encodinganalog="245$a">Diaries</unittitle>
            </did>
            <altformavail encodinganalog="530">
               <p>Microfilm edition available. Shelf no. 17,174</p>
            </altformavail>
            <c02 level="file">
               <did>
                  <container type="box">3</container>
                  <container type="reel">1</container>
                  <unittitle encodinganalog="245$a">Vols. 1-15, 
				  <unitdate type="inclusive" encodinganalog="245$f">1891-1902</unitdate> 
                  </unittitle>
               </did>
            </c02>
            <c02 level="file">
               <did>
                  <container type="box">4</container>
                  <container type="reel">2</container>
                  <unittitle encodinganalog="245$a">Vols. 16-23, 
				  <unitdate type="inclusive" encodinganalog="245$f">1903-1949</unitdate> 
                  </unittitle>
               </did>
            </c02>
         </c01>
      </dsc>
   </archdesc>
</ead>