Electric toy making for amateurs. This work treats on the making of electrical toys, electrical apparatus, motors, dynamos and instruments in general ... By T. O'Conor Sloane .. (1914)
Sloane, T. O'Conor (Thomas O'Conor), 1851-1940 · New York, The N.W. Henley publishing co. · leaf 86
Fig. 34. PendulumCircuit Breaker. ELECTRIC INSECTS. 85 position of the mercury globule, to give a good swing,must be determined by experiment. The plumb-bob … Electrical Dragon-Fly and Bee. is also made adjustable, so as to allow of varying thetime of movement of the insects wings. The dragon-fly and bee are . more independent.They are by nature quicker in their motions than SG ELECTRIC TO Y MAKING. the butterfly, and are constructed to rapidly move…
Electric apparatus and appliances · Electric toys
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