Appleton's dictionary of machines, mechanics, engine-work, and engineering : illustrated with four thousand engravings on wood ; in two volumes (1873)
D. Appleton and Company · New York : D. Appleton and Co. · leaf 706
principle never beforeapplied to the telegraph, namely, the heating or igniting effect of electricity. When an electrical ctr-runt»6ows through a fine platinum wire it ignites it, or brings it to a red-heat. If this wire is bent, aaat A, in the figure below, so as to be in contact, for a short… … This instrument is shown in Fig. SS99, the greater part of which consists of the clock-work, spool, <!rc,required for moving the paper. Above the clock-work are two pillars, supporting an axis, upon whichis the adjustable wire-holder, the lower extremity of which is seen touching the fillet of…
Mechanical engineering · Mechanics · Engineering
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