Spon, Ernest, Haldane, Robert, Lock, Charles G. Warnford (Charles George Warnford), 1853-1909 · London ; New York : E. & F.N. Spon · leaf 214
lament in communi- cation with a small lubricator. The improvements also consist in so arrang- ing the parts of the current-regulator that the points of loose contact can be actuated by the sound-waves, whilst wherein the two contact pieces are held they are protected from the moisture of the… … other electrode is directed. The im- sists of an inclined grating of carbon strips, against which the voice-waves provements relate further to the form
Workshop recipes · Technology · Industrial arts
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
