Cyclopedia of applied electricity : a practical guide for electricians, mechanics, engineers, students, telegraph and telephone operators, and all others interested in electricity (1905)
American School (Chicago, Ill.) · Chicago : American School of Correspondence · leaf 255
Fitr. !). Fijr. lu. rosion. The bells on the market today are of two classes, the ironbox bell and the wooden box bell- A bell of the wooden l)ox type isshown in Fig. 1», and a higher grade bell of the iron frame skeletontype is shown in Fig. 10. Bells without covers should never be used,as dust…
Electrical engineering
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