The boy's own book of indoor games and recreations : a popular encyclopædia for boys (1890)
Stables, Gordon, 1840-1910, Hutchison, George Andrew, 1841-1913 · Philadelphia : J.B. Lippincott · leaf 232
d gas-bag. A projecting ledge is fixedon the outside of the upper board, about eightinches from its end, against which the weightrequired to press out the gas can rest. Theweights should be square-shaped, an^l the mostconvenient size is a half-hundredweight. Whentwo bags are required (as in the… … Fig. 8. 228 THE MAGIC LANTERN, AND ALL ABOUT IT. weight required to be used with a bag of eight feet capacity when employed for theoxycalcium lamp or jet should be about 56 lbs., but at least three times that amoi>ntshould be placed on the bags for the production of the oxyhydrogen light. It is…
Games · Amusements
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