India-rubber and Gutta-percha.—Vulcanized or not, rendered plastic by treatment with “bi-sulphurate” of carbon (?) and absolute alcohol: Francis Baschnagel, August 14.
India-rubber Cloth.—Made by pressing cloth upon each side of sheet-rubber by means of rollers: H. G. Tyer, and John Helm, January 30.
India-rubber.—Scraps and powder of hard, vulcanized, moulded and cemented by heat and pressure: Charles Morey, January 9.
India-rubber, Vulcanized.—Treated with alkalies and oil to remove sulphur: Sigismund Beer, May 29.
India-rubber.—Crushed, washed, treated with potash, or soda, in vacuum, and washed to purify: A. G. Day, June 10.
India-rubber Sheet.—With surfaces not vulcanized, united to cloth: Nathaniel Hayward, May 6.
India-rubber.—Surface of vulcanized made rough, then coated with cement, and heated to 235° to render adhesive: Nathaniel Hayward, April 15.
India-rubber.—Treatment of sulphured rubber with drying oils; or common rubber with sulphured oils: Wm. F. Shaw, August 12.
India-rubber.—Treatment of vulcanized with nitric acid and fusel oil, to purify and render adhesive: Henry Forstrick, October 28.
India-rubber.—Boiling in potash to remove sulphur from the surface of vulcanized and render adhesive: Richard McMullin, March 18.