1915 Helps for roofers and sheet metal workers (1915)
L.D. Berger · L.D. Berger · leaf 143
, but wedo produce 100% efficiency from any gas andpressure, giving such perfect combustion that weshow results not heretofore obtained, both ineconomy aiid efficiency. The Berger Direct Jet Bunsens give instantlya hot blast ranging from 1,900° to 2,250% de-pendent on quality of gas and pressure,… … No. I No. 6 No. 4. BERGERStudents Buusen, with Pilot Light.IIeig:ht. 6J in. Base, 7 in.Gas Consumption, 5 ft. per hour. $2.00 No, 5. BERGER Standard Biuisen—with Pilot Lightand shut off valve.Lengtli, 7 in. Threaded to connect on | in. iron pipe.Consumi)tion, 10 ft. per hour. ..J53.00 No. 6.…
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