St. John, Thomas M. (Thomas Matthew), b. 1865 · New York, T. M. St. John · leaf 121
meter is usually placed in the cellar. In newhouses the insulated conducflors are usually run through some sort of tube whichadls as a double pro-tedlion, all being hiddenfrom view. Fig. 158shows a short length ofiron tube with a liningof insulating material.Wires are often runthrough tubes made… … Fig. 164.
Electricity
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