Inside Out Library · Explore

Scientific American, Vol. 43, No. 6 (1880) (1880)

leaf 3

An illustration from Scientific American, Vol. 43, No. 6 (1880), 1880, leaf 3
reased than diminished, having string, or acoustic telephone, and transmits the vibrations penetrating point is forced through the top of the can near been 22°2 per 1,000 in 1856, 22:3 in 1876, and 23 in 1877. In to the teeth and bones of the head, affecting the auditory all England the rate bad… … ters inhabited by the poor against 42 among the higher classes. Villermé calculated that the probable life of the BROCK’S CAN OPENER, nerves, aud enabling persons having defective ears to hear. infant of a weaver at Mulhouse. was as low as 1 year and 6 This device was lately patented by Mr. H. G.…

Internet Archive · Public domain (published before 1931). Free to use for anything.

More pictures from Scientific American, Vol. 43, No. 6 (1880)

More like this