Putnam, J. Pickering (John Pickering), 1847-1917 · Boston, Ticknor and Co. · leaf 186
r tubes, and all places wherea gas pressure has to be resisted. In order to test the degree of this permeability under varying press-ures, the writer had cast six cylindrical boxes from some of the softeriron used by a foundry-man in making furnace and stove castings.. The boxes, havingthe section… … Fig. 135. Cast-iron Cups Tested forPermeability. Fig. 136. Experiment on the Permeability of Cast-iron. spond, making with cement an air-tight joint. (Gas-piping was formerlyfrequently made of cast-iron, but its permeability to gas under pressurewas too great, and it was abandoned in favor of…
Fireplaces
Internet Archive · Boston Public Library · Public Domain Mark 1.0. Free to use for anything.
