The telephone
Philipp Reis imagined that electricity could be propagated through space, as light can, without the aid of a material conductor, and he performed some experiments on the subject. The results were described in a paper, "On the Radiation of Electricity," which, in 1859, he posted to Professor Poggendorff; for insertion in the then well-known periodical, Annalen der Physik. The manuscript was declined, to the great disappointment of the sensitive young teacher.
Philipp Reis had studied the organs of hearing, and the idea of an apparatus for transmitting sound by means of electricity had been floating in his mind for years. Incited by his lessons on physics, he attacked the problem, and was rewarded with success. In 1860, he constructed the first prototype of a telephone, covering a distance of 100 m. In 1862 he again tried Poggendorff, with an account of his "Telephon" as he called it; but his second offering was rejected like the first. The learned professor, it seems, regarded the transmission of speech by electricity as a chimera; but Philipp Reis, bitterly, attributed the failure to his being "only a poor schoolmaster."
Reis had difficulty in interesting people in Germany in his invention despite demonstrating it to (among others) Wilhelm von Legat, Inspector of the Royal Prussian Telegraph Corps in 1862 (Legat, 1862). It aroused more interest in the United States In 1872, Prof Vanderwyde demonstrated Reis's device in New York where it was seen by Thomas Edison, and possibly officials of Western Union and Alexander Graham Bell. Bell, Edison and Berliner drew on Reis's device as a starting point in their subsequent development of components of the telephone.