_Sixty-ninth_, to Charles Goodyear, New Haven, Conn., October 12, 1852. For improvement in making India-rubber Bat cloth. The claim is passing the bat or fleece cotton, flax, silk, or other fibrous substance, together with dissolved or softened India-rubber, gutta-percha or other vulcanized gum, or the compounds or preparations thereof, between calendering rollers, with an elastic substance interposed between the bat or fleece, and one of the rollers as described, or between the glazed apron and one of the rollers, substantially described. _Seventieth_, to John L. Kingsley, New York, January 18, 1853. For improvement in metallic gum composition. The nature of this invention consists in the process of preparing and using compositions made by grinding metals, earths, and other similar materials, with the raw uncured gums of gutta-percha and caoutchouc (India-rubber.) Also claims—The making of stereotype moulds, and plates of the raw uncured gum, combined with the pulverized oxides of iron and antimony, or other equivalents. _Seventy-first_, to Richard Solis, of New Brunswick, N. J., February, 1853. For India-rubber. I claim the manufacture of India-rubber fabrics by the mixture of ground or powdered vulcanized rubber, with the ordinary India-rubber of commerce. _Seventy-second_, to Charles Goodyear, New York, April 12, 1853. For improvement in manufacturing articles composed of gutta-percha. This invention consists in using or employing sand, pulverized soapstone, plaster, or some similar granular or pulverized or porous matter, or moulds made of porous substances, to sustain and keep the form of moulded or modelled article composed of caoutchouc or its compounds, and other gums, during the process of vulcanization, in proper shape and form. The caoutchouc or other gums are taken in a green state, and formed into the exact shapes desired, then covered with pulverized soapstone, or other similar granular or adhesive powder; they are placed in a box and heated to 200° or 300° Fahrenheit, from three to seven hours when the articles are vulcanized. _Seventy-third_, to Charles Goodyear, and Robert Haering, of New Haven, Conn., April 12, 1853. (Assigners to Charles Goodyear.) Patented in England, March 4, 1851. For manufacturing India-rubber and gutta-percha. The art or method of manufacturing articles composed in part of caoutchouc, or other gums, susceptible of vulcanization, by heating or vulcanizing the same, when surrounded with and pressed upon, externally or internally by or moulded in pulverized soapstone, sand, plaster, or other similar granular, pulverized or porous matter, or in moulds of plaster or other porous substance, as described. _Seventy-fourth_, to John L. Kingsley, New York, June 14, 1853. For improvement in moulding gutta-percha Stereotype Plates.