1861 October 26 Read Paper “On Telephony by the Galvanic Current” before the Physical Society of Frankfort-on-the-Main. " November Read Paper to the Physical Society of Frankfort-on-the-Main, entitled “Explanation of a new Theory concerning the Perception of Chords and of Timbre as a Continuation and Supplement of the Report on the Telephone.” 1861 December Wrote out his Paper “On Telephony,” as printed in the ‘Jahresbericht.’ 1862 May 8 Notice in ‘Didaskalia’ of Reis’s invention. " May 11 Lectured and showed the Telephone to the Free German Institute (Freies Deutsches Hochstift) in Frankfort-on-the-Main. " Article on the Telephone, communicated by Inspector Von Legat to the Austro-German Telegraph Society, and subsequently printed in its ‘Zeitschrift’ (Journal). 1863 July 4 Showed his improved Telephone to the Physical Society of Frankfort-on-the-Main. " September 6 Reis’s Telephone shown to the Emperor of Austria and the King of Bavaria, then visiting Frankfort. " Sept. 17-24 Meeting of the “Deutscher Naturforscher” at Stettin; Reis’s Telephone shown there by Professor Böttger. 1864 February 13 Meeting of the “Oberhessische Gesellschaft für Natur- und Heilkunde” at Giessen; Lecture by Professor Buff, and exhibition by Reis of his Telephone. " September 21 Meeting of the “Deutscher Naturforscher” at Giessen. Reis gave an explanation of the Telephone and the history of its invention, and exhibited it in action before the most distinguished scientific men of Germany. 1872 September Meeting of the “Deutscher Naturforscher” at Wiesbaden; Reis announced to show his “Fallmaschine,” but prevented by ill-health. 1874 January 14 Philipp Reis died. [Illustration: Fig. 1. Monument to Philipp Reis in the Cemetery at Friedrichsdorf.] FOOTNOTES: