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 298
OGGGG Battery10 orv cells inseries-paraixel Receiving Set Transmitting Set Fig. 326. —Complete Wirino; plan — when a Microphone Detector is used. purchased, as they are too complex to make. The out-fit consists of an induction-coil (spark-coil)^ spark-gap^battery, key, and switch. The… … iATTEBv Zinc ^^PRlMARV
Woodwork · Toys · Amusements
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer04inte-450-220.webp)
