29 - Water - Chapter XXIX. Drainage Before the Ice Age
Listen to Nature's Miracles: Familiar Talks on Science, Vol. 1. by Gray, E on your phone!
Elisha Gray (August 2, 1835 – January 21, 1901) was an American electrical engineer who co-founded the Western Electric Manufacturing Company. Gray is best known for his development of a telephone prototype in 1876 in Highland Park, Illinois and is considered by some writers to be the true inventor of the variable resistance telephone, despite losing out to Alexander Graham Bell for the telephone patent. (Summary from Wikipedia)