asy reach and control of one man, and the design Mr. Heinrich Trenk, of Berlin, Germany, has patented a amounts to about 140 lb., and the moving composition for tanning hides and skins. parts are reduced to a simple lever and a pis- Two solutions are employed, mixed in the pro- portion of two of… … operaied by a vacuum as by air pressure. coiled around it. A counterbalance is se- The piston is moved more or less, and with cured about the foot of the mast to increase greater or less force according as the air the inertia and to operate as self-adjusting pressure is increased or diminished, and…
Internet Archive · Public domain (published before 1931). Free to use for anything.
