Light for evening hours : heat and light, part II. (1890)
Detroit Heating & Lighting Co. · Detroit Heating & Lighting Co. · leaf 11
equal to an ordinary city gas burner, averages about halfa cent per hour. Coal gas usually costs from $2 to $5per thousand cubic feet, while the gas manufactured byour machine will not, in most cases, exceed si.no perthousand. Five gallons of gasoline will produce about onethousand cubic feet of…
Lighting · Light fixtures · Electric lighting
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