Putnam, J. Pickering (John Pickering), 1847-1917 · Boston, Ticknor and Co. · leaf 188
Fig. 137. Test of Gas Pressure by meansof a Manometer. … Fig. 138. Section of Pig-iron. 1 The only test made by furnace men is a careful ocular inspection. This is evidentlyequivalent to no test at all, the air-holes being microscopic ; a test would involve either setting-up the furnace complete and applying atmospheric pressure, or else a special test…
Fireplaces
Internet Archive · Boston Public Library · Public Domain Mark 1.0. Free to use for anything.
