Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 240
resistance must anelectric heater have, to give oflf 6,000 B.T. U. per hour, with a current of 20 am-peres ? Fig. 164. Electric Radiator. AVe have learned that 1 B. T. U. = 252 calories; so, in thepresent case, 6,000 X 252 = 1,512,000 calories must be provided.Substituting the known values in the…
Architecture · Building · Carpentry
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