Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 174
d the lumber is placed in the cylinder,the door closed and fastened, steam is admitted, and thewood subjected for hours to its action. The purposeclaimed is the softening of the mass and the saps con-tained therein. This operation is followed by a vacuum which aims toextract the liquefied saps, so…
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