sign 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 the first to one of the ton. The arrangement… … operated 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 GLENN'S AIR SHAKE. greater or less force according as the air the inertia and to operate as self-adjusting pressure is increased…
Patented · Patents · Herreshoff · Iron · Ships · Boiler · Scientific American · Vessels · Small quantity · Erie basin · Crown sheet · Wood working · Sand bath · Feed water · Herreshoff launch · Sewing machine · Armored ships
Internet Archive · Public domain (published before 1931). Free to use for anything.
