Easy electrical experiments and how to make them; (1918)
Dickinson, Leonard Perley, 1874- [from old catalog] · Chicago, F. J. Drake & co · leaf 219
of H and another adjustment of S.Having once fixed S, however, it is not to be changed. Itcan be soldered permanently to the terminals of the instru-ment and coiled up inside the *&&q. Th^ various points uponthe scale of D may be obtalnea r»y adjusting H until thestandard reads the proper… … EASY ELECTRICAL EXPERIMENTS 205 CHAPTER LXIV. A PORTABLE BATTERY AND SWITCHLESS LAMP. rfz%> A very convenient and durable portable battery and lamp canbe constructed as follows: The details of construction are shown in Figures 1 and 2. Thelamp requires no switch, this result being obtained by…
Electric apparatus and appliances · Electricity
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