Putnam, J. Pickering (John Pickering), 1847-1917 · Boston, Ticknor and Co. · leaf 204
ir wascompressed in a gas-holder shown at the left of the table, and conductedby a rubber tube to two bent glass tubes containing, the one chloride ofcalcium and the other sulphuric acid, in passing through which it wasthoroughly dried. The pressure was measured by a water manometer, andthe piece… … Fig. 145. Apparatus for Testing the Porosity of Building Materials. opposite side. The four remaining sides were covered with an air-proofcement composed of wax and rosin to prevent the escape of air at anyother points than that covered by the cup and tube opposite the one deliver-ing the fresh…
Fireplaces
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