Gage, Alfred P. (Alfred Payson), 1836-1903, Fessenden, C · Toronto : W.J. Gage · leaf 405
coils 5, I. Occasional. Annunciators, domestic bells 2. 1, 8, 4. Exploding fuses 2, 4. Electrical measurements (constant current) 8,4,3. 382 APPENDIX. SECTION a. Apparatus to illustrate-wave-motion.— The most efficient apparatus for this purpose that we have seen may be constructed asfollows.… … elastic cord (better, small spiral wire coil), and connect the ball at oneextremity of tlie series with a suspended weight B (weighing about1) , and from the ball at the other extremity suspend a small weightA, which may be easily removed when desirable. By a simple vibra-tion given with the hand…
Physics
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