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<h1 style="font-family:arial;">Volume 4 Chronology</h1><br>
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<div style="margin-left:15%;padding:1px 10px;height:1000px;font-family:arial;">
<table border="1" style="font-family:arial;font-size:14pt;">
<tr>
<td width="200" style="font-size:20pt;"><h1>Year</h1></td>
<td width="200" style="font-size:20pt;"><h1>Date</h1></td>
<td width="200" style="font-size:20pt;"><h1>Event</h1></td>
</tr><tr>
<td rowspan="100" width="180" style="font-size:20pt;"><h1>1878</h1></td>
<td>January 1 to 3</td>
<td>Exhibits phonograph at Western Union offices in New York</td>
</tr><tr>
<td>January 3</td>
<td>Designs flywheel phonograph</td>
</tr><tr>
<td>January 7</td>
<td>Contracts for the development and manufacture of phonographic toys and clocks</td>
</tr><tr>
<td>January 8 to 10</td>
<td>Tests telephone at Western Union's New York offices, further straining relations with company electricians</td>
</tr><tr>
<td>January 12</td>
<td>With George Prescott and Gerritt Smith, makes William Orton trustee of British quadruplex patent rights</td>
</tr><tr>
<td>January 23</td>
<td>Theodore Puskas leaves for Europe as Edison's agent for the phonograph and telephone</td>
</tr><tr>
<td>January 29 to 30</td>
<td>With Charles Batchelor, visits Ansonia (Conn.) Clock Co. and experiments with applying the phonograph to clocks</td>
</tr><tr>
<td>January 30</td>
<td>Signs agreement for commercial exploitation of the phonograph in the United States</td>
</tr><tr>
<td>January</td>
<td>
<ul>
<li>Makes flywheel phonographs to give to prominent scientific and technological figures</li>
<li>British investors in Edison's automatic telegraph assert claim to the quadruplex, beginning prolonged legal contest</li>
</ul>
</td>
</tr>
<tr>
<td>January-February</td>
<td>Edward Johnson undertakes lecture tours promoting Edison's phonograph and carbon telephone.</td>
</tr>
<tr>
<td>February 1</td>
<td>William Preece and John Tyndall demonstrate the phono graph at the Royal Institution in London, the first exhibition outside the United States</td>
</tr><tr>
<td>February 4</td>
<td>With Henry Bentley, begins testing the carbon telephone transmitter between New York and Philadelphia</td>
</tr><tr>
<td>February 6</td>
<td>Completes design of small demonstration phonograph to be sold at the Paris Universal Exposition</td>
</tr><tr>
<td>February 19</td>
<td>Issued first phonograph patent.</td>
</tr><tr>
<td>February 22</td>
<td>Plans series of experiments to develop a telephone receiver that does not infringe Bell patents</td>
</tr><tr>
<td>February 28</td>
<td>Executes extensive phonograph and telephone caveats and executes three patent applications, for telephone stations and call signal apparatus, for preventing interference between telephone lines, and for the aerophone</td>
</tr><tr>
<td>March 1</td>
<td>Sends James Adams to Philadelphia to assist Henry Bentley with telephone tests</td>
</tr><tr>
<td>March 2 to 8</td>
<td>Edward Johnson becomes general agent of prospective pho nograph company and orders manufacture of first commercial phonographs</td>
</tr><tr>
<td>March 11</td>
<td>Theodore Puskas demonstrates the phonograph at the Academy of Sciences in Paris, the first public demonstration in Continental Europe</td>
</tr><tr>
<td>March 12</td>
<td>Devises improved carbon telephone transmitter</td>
</tr><tr>
<td>March 15</td>
<td>Begins negotiations with Western Union presider:it William Orton for a new telephone contract with tthe company</td>
</tr><tr>
<td>March 19</td>
<td>Sends James Adams to London with telephone transmitters and receivers to be tested on British Post Office lines</td>
</tr><tr>
<td>March 20</td>
<td>First public demonstration of improved carbon telephone transmitter at the Franklin Institute in Philadelphia</td>
</tr><tr>
<td>Winter-Spring</td>
<td>Experiments with hand-powered phonographs and attempts to develop clockwork driven cylinder and disk phonographs. Expands Menlo Park laboratory staff.</td>
</tr><tr>
<td>March 22</td>
<td>Signs agreement, negotiated by Theodore Puskas, with the London Stereoscopic and Photographic Co. for commercial exploitation of the phonograph in Great Britain</td>
</tr><tr>
<td>March 26</td>
<td>Notification of patent interferences marks beginning of long contest over telephone patents</td>
</tr><tr>
<td>March 29</td>
<td>The New York World publishes first description of Edison's medicinal preparation for relieving pain ("polyform"). </td>
</tr><tr>
<td>March</td>
<td>Newspapers begin extensive coverage of Edison, which helps to spread his fame and produces crowds of visitors to Menlo Park</td>
</tr><tr>
<td>March-April</td>
<td>Discusses with Gardiner Hubbard the possibility of Bell Telephone Co. acquiring rights to the carbon transmitter. </td>
</tr><tr>
<td>April 1</td>
<td>The New York Daily Graphic publishes April Fool's hoax describing Edison's "Food Creator."</td>
</tr><tr>
<td>April 4</td>
<td>Returns signed membership forms to the Theosophical Society</td>
</tr><tr>
<td>April 6</td>
<td>Makes first of several loans to Joseph Murray to pay back rent on Ward Street shop in Newark </td>
</tr><tr>
<td>April 8</td>
<td>Biographical sketch by George Bliss published in the Chicago Tribune</td>
</tr><tr>
<td>April 10</td>
<td>Dubbed "Wizard of Menlo Park" by the New York Daily Graphic</td>
</tr><tr>
<td>April 18 to 19</td>
<td>Demonstrates phonograph for the National Academy of Sciences, members of Congress, and President Rutherford B. Hayes</td>
</tr><tr>
<td>April 19</td>
<td>The Wa_shington Star publishes first account of Edison's tasimeter principle and describes his hearing aid device, prompting numerous inquiries</td>
</tr><tr>
<td>April 19</td>
<td>William Orton dies</td>
</tr><tr>
<td>April 24</td>
<td>Edison Speaking Phonograph Co. is incorporated</td>
</tr><tr>
<td>April</td>
<td>Publishes "The Future of the Phonograph;' ghost-written by Edward Johnson, in the North American Review.</td>
</tr><tr>
<td>May 1</td>
<td>Universal Exposition, with Edison exhibit, opens in Paris</td>
</tr><tr>
<td>May 6</td>
<td>Observes transit of Mercury with borrowed telescope</td>
</tr><tr>
<td>May 16</td>
<td>Develops new tasimeter design</td>
</tr><tr>
<td>May 22</td>
<td>Visited by a delegation of Boston newspaper reporters and demonstrates telephones, the tasimeter, phonograph, and other acoustic devices
</td>
</tr><tr>
<td>May 29</td>
<td>Executes second phonograph caveat, based on European patent specifications completed in early May</td>
</tr><tr>
<td>May 30</td>
<td>Demonstrates phonograph with Charles Batchelor and several other associates at the Convent of Mount St. Vincent, a Catholic girls' school near Yonkers, N.Y</td>
</tr><tr>
<td>May 31</td>
<td>Executes agreement assigning telephone patents to Western Union for six thousand dollars annually for seventeen years</td>
</tr><tr>
<td>May</td>
<td>Edison Speaking Phonograph Co. hires James Redpath to manage phonograph exhibitions and begins training exhibitors</td>
</tr><tr>
<td>May to June</td>
<td>Develops new hand crank phonograph for exhibition. Arranges phonograph and telephone sales agencies for Australia and Central and South America</td>
</tr><tr>
<td>June 1</td>
<td>Makes George Gouraud his agent for telephone in Great Britain</td>
</tr><tr>
<td>June 2</td>
<td>Starts nephew Charles Edison on experiments to develop a noninfringing telephone receiver, which continue through the end of he year</td>
</tr><tr>
<td>June 8</td>
<td>Publishes letter in the New York Daily Tribune asserting priority to microphone principle claimed by David Hughes, beginning protracted dispute</td>
</tr><tr>
<td>June 17</td>
<td>Orders 25 transmitting and receiving telephone sets for sale abroad from Partrick and Carter in Philadelphia</td>
</tr><tr>
<td>June 26</td>
<td>Receives first honorary doctorate, from Union College in Schenectady, N.Y</td>
</tr><tr>
<td>Spring</td>
<td>Attempts to develop hearins aid and other acoustic devices</td>
</tr><tr>
<td>July 3</td>
<td>With Charles Batchelor, begins to investigate causes of noise along New York's Metropolitan Elevated Railroad</td>
</tr><tr>
<td>July 8</td>
<td>Writes letter to the Chemical News asserting priority over Edwin Houston and Elihu Thomson for the telephone repeater</td>
</tr><tr>
<td>July 13</td>
<td>Leaves from New York with George Barker for solar eclipse expedition to Rawlins, Wyo., and a month long vacation in the western United States</td>
</tr><tr>
<td>July 17</td>
<td>Begins funding Patrick Kenny's facsimile telegraph experiments</td>
</tr><tr>
<td>July 20</td>
<td>Purchases hunting and fishing equipment in Laramie, Wyo</td>
</tr><tr>
<td>July 29</td>
<td>Attempts to measure heat of solar corona with tasimeter during total eclipse</td>
</tr><tr>
<td>July to August</td>
<td>Charles Batchelor and Edward Johnson make improvements to exhibition phonograph.</td>
</tr><tr>
<td>August 1 to 3</td>
<td>Visits San Francisco</td>
</tr><tr>
<td>August 6 to 7</td>
<td>Tours Yosemite and stays overnight in nearby Mariposa,Calif.</td>
</tr><tr>
<td>August 9</td>
<td>Spends night at Virginia City, Nev., where he inspects mines and discusses problems of heat and ventilation in the shafts</td>
</tr><tr>
<td>August 15</td>
<td>Goes hunting and fishing in Wyoming</td>
</tr><tr>
<td>August 21</td>
<td>Visits George Bliss in Chicago</td>
</tr><tr>
<td>August 22</td>
<td>Receives news of award of a Grand Prize from the Paris Universal Exposition</td>
</tr><tr>
<td>August 23</td>
<td>Presented as new member of the American Association for the Adv'ancement of Science at the annual meeting in St. Louis, and delivers a paper on the tasimeter.</td>
</tr><tr>
<td>August 24</td>
<td>Returns to Chicago</td>
</tr><tr>
<td>August 26</td>
<td>Arrives in Menlo Park</td>
</tr><tr>
<td>August 27</td>
<td>Begins electric light experiments.</td>
</tr><tr>
<td>September 1</td>
<td>Edward Johnson begins exhibition of improved phonograph in New York City and later includes other Edison inventions</td>
</tr><tr>
<td>September 8</td>
<td>With Charles Batchelor, George Barker and Charles Chandler, visits William Wallace's shop in Ansonia, Conn., to see electric light and power apparatus</td>
</tr><tr>
<td>September 10</td>
<td>Drafts first electric lighting caveat</td>
</tr><tr>
<td>September 13 to 16</td>
<td>Announces he has solved problem of incandescent electric lighting.</td>
</tr><tr>
<td>September 14</td>
<td>Receives dynamo from William Wallace</td>
</tr><tr>
<td>September 19</td>
<td>Begins to receive offers from prospective electric lighting investors</td>
</tr><tr>
<td>September 21</td>
<td>Theodore Puskas forms company for commercial exploitation of Edison and Elisha Gray telephones in France </td>
</tr><tr>
<td>September 27</td>
<td>Drafts second electric lighting caveat</td>
</tr><tr>
<td>October 3</td>
<td>Agrees to allow Grosvenor Lowrey to conduct negotjations with prospective investors</td>
</tr><tr>
<td>October 5</td>
<td>Executes first patent application for electric lighting.</td>
</tr><tr>
<td>October 5 to 18</td>
<td>Works on new phonograph for business dictation</td>
</tr><tr>
<td>October 16</td>
<td>Edison Electric Light Co. incorporated, principally by investors connected with Western Union and Drexel, Morgan & Co</td>
</tr><tr>
<td>October 23-26</td>
<td>Confined to bed by facial neuralgia </td>
</tr><tr>
<td>October 26</td>
<td>Edison's second son, William Leslie, is born in Menlo Park</td>
</tr><tr>
<td>October 30</td>
<td>Angered by investors' concern over William Sawyer's and Albon Man's joint claim to priority in electric lighting</td>
</tr><tr>
<td>October</td>
<td>
<ul>
<li>Executes four patent caveats on electric lighting.</li>
<li>Purchases a new steam engine, a Weston dynamo, and a second Wallace dynamo.</li>
<li>Begins construction of new mjichine shop and office buildings</li>
</ul>
</td>
</tr><tr>
<td>November 6</td>
<td>Conducts telegraphic conversation with Lemuel Serrell about filing new lamp patent in Britain</td>
</tr><tr>
<td>November 13</td>
<td>Hires Francis Upton to conduct search of relevant technical and scientific literature in order to allay fears of Edison Electric Light Co. investors</td>
</tr><tr>
<td>November 15</td>
<td>Agrees to assign lighting patents to Edison Electric Light Company for thirty thousand dollars plus stock and royalties</td>
</tr><tr>
<td>November 20</td>
<td>Designs two dynamos, one of which is included in a British patent application</td>
</tr><tr>
<td>November 22</td>
<td>Begins negotiating with Gold and Stock regarding new electromotograph telephone receiver</td>
</tr><tr>
<td>November 23</td>
<td>With Edison's support, Uriah Painter and Edward Johnson take control of Edison Speaking Phonograph Co</td>
</tr><tr>
<td>November 29-30</td>
<td>Designs first electric meter</td>
</tr><tr>
<td>November-December</td>
<td>
<ul>
<li>Displays various electric lighting devices at Menlo Park for Edison Electric Light Co. investors.</li>
<li>Compares operating costs of gas, arc, and incandescent light ing systems.</li>
<li>Negotiates through Grosvenor Lowrey with Drexel, Morgan & Co. for foreign rights to electric lighting inventions</li>
</td>
</tr><tr>
<td>December 3</td>
<td>Executes first patent application for an electric generator, based on earlier tuning fork engine</td>
</tr><tr>
<td>December 14</td>
<td>Laboratory workers begin moving equipment into new building</td>
</tr><tr>
<td>December 15</td>
<td>Hires Francis Upton as mathematical and experimental assistant</td>
</tr><tr>
<td>December</td>
<td>Acquires Siemens and Gramme dynamos and begins extensive tests of existing generator technology</td>
</tr><tr>
<td>Late December</td>
<td>Designs and begins to build new dynamo</td>
</tr>
</table>
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