'A key to Alexander Graham Bell's experiments was one of these, procured by a doctor friend, Clarence Blake'
an ear
INVENTORS: A key to Alexander Graham Bells experiments was one of these, procured by a doctor friend, Clarence Blake
A key to Alexander Graham Bell's experiments was one of these, procured by a doctor friend, Clarence Blake
A key to Alexander Graham Bell's experiments was one of these, procured by a doctor friend, Clarence Blake
INVENTORS
an ear
INVENTORS