Meanwhile, Elisha Gray was also experimenting with acoustic telegraphy and thought of a way to transmit speech using a water transmitter. On February 14, 1876, Gray filed a caveat with the U.S. Patent Office for a telephone design that used a water transmitter. That same morning, Bell's lawyer filed Bell's application with the patent office. There is considerable debate about who arrived first and Gray later challenged the primacy of Bell's patent. Bell was in Boston on February 14 and did not arrive in Washington until February 26. COUNT 5
QSN1 What material did Elisha Gray use to convey sound? ANS1 water QSN2 On what date did Gray and Bell both put in for a patent? ANS2 February 14, 1876 QSN3 On what day did Bell get to Washington? ANS3 February 26 QSN4 What office in Washington did Bell and Gray visit? ANS4 U.S. Patent Office QSN5 What sort of machine did Bell and Gray both try to patent at the same time? ANS5 telephone