other, and the the mariner. When he can see a danger he has a boken, N. J., invented an instrument to determine sound is obliterated. the direction of sound to which he also gave the name chance to avoid it, but in a fog all he knows posi- "Accordingly, in determining the direction of the… … sound not tuned in unison with it. the late Prof. Elisha Gray's method of ring- DOOE OF MUTOSCOPE LOWERED, BOOK OF PICTURES REMOVED SIDE m 1 ■ 1 » A Tunnel to the Isle of Wight. TO SHOW TURNING GEAR ing bells under water have been pressed into service. The Hamilton-Foster fog-signal, The bringing…
Manufacturers · Munn · Apparatus · Machine · Steel · Patents · Scientific American · Yellow fever · Transmitting station · Total weight · American supplement · Flat floor · Gas engine · Chlorhydric acid · Sewing machine · Southern california
Internet Archive · Public domain (published before 1931). Free to use for anything.
