An elementary book on electricity and magnetism and their applications (1919)
Jackson, Dugald C. (Dugald Caleb), 1865-1951, Jackson, John Price, b. 1868, Black, Newton Henry, b. 1874 · New York, The Macmillian Co · leaf 410
\ . Oil Channels Fig. 256. — View of the General Electric CompanysH-type of transformer ; assembled, and plan. 376 ELECTRICITY AND MAGNETISM use concentric cylindrical coils, which are the easiest to manu-facture. This arrangement is compact and more easily cooledthan either of the other forms.…
Electricity · Magnetism
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