Conversation so far:
When did the inventor Lee de Forest work on Arc radiotelephone development ?
On July 18, 1907, de Forest made the first ship-to-shore transmissions by radiotelephone.
How did the inventor Lee de Forest do Arc radiotelephone development?
Using his sparkless arc transmitter, de Forest first transmitted audio across a lab room.
What did Lee de Forest transmit in his 1906 experiment ?
de Forest first transmitted audio across a lab room on December 31, 1906, and by February was making experimental transmissions, including music produced by Thaddeus Cahill's telharmonium.

Question: is there anything else interesting about the article?
Self-contained rewrite: is there anything else interesting about the  Lee de Forest article?