Handicraft for handy boys; practical plans for work and play, with many ideas for earning money (1911)
Hall, A. Neely (Albert Neely), b. 1883- · Boston, Lothrop, Lee & Shepard Co · leaf 289
or 25 cents. Figure 312shows a simple form of this detector. The silicon should be held to a base block by astrip of brass having holes punched through it largeenough for the bolt of a binding-post to stick through(Fig. 313), and a small piece of springy wire should A BOYS WIRELESS TELEGRAPH OUTFIT… … Fig. 312. Fig. 312.—A Home-made Silicon De-tector. (See Fig. 325.) Fig. 313. — Strip of Brass with whichSilicon is held to Binding-post. Fig. 314. — Bend a Piece of Wire likethis and connect as shown in Fig. 312. *&• 312-tector the end of the wire which rests on the silicon should be moved…
Woodwork · Toys · Amusements
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