Willoughby, George Alonzo, 1894- · Peoria, Ill. : Manual Arts Press · leaf 20
k alone arenot very good insulating materials, especially if the pressureis high, and one should not think that because he has clothesof cotton or silk electricity will not pass thru them. It is easy to remember these points if the use of an um-brella is brought to mind. An umbrella is covered with… … ^=a«mmiiusz Fig. 3. Several well-known coverings used for protection againstwater, and several common electrical-conductor coverings of the samekind of material. the person is liable to get damp. Likewise, these materialsare good for protecting against electricity in some cases,but not if they…
Electricity · Electrical engineering
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