Another would-be technical breakthrough was the Bell "phonautograph" of 1874, actually made out of a human cadaver's ear.
"Hacker Crackdown" by Bruce Sterling
He suggested the use of the human ear itself as a phonautograph, instead of making an artificial imitation of it.
"Little Masterpieces of Science:" by Various
Scott, phonautograph, 141, 407.
"Inventions in the Century" by William Henry Doolittle