_Eighty-eighth_, to Ellsworth D. S. Goodyear, assignor to the New York Rubber Company, March 28, 1854. For improvement in processes for treating India-rubber. The improvement refers to the manufacture of hollow articles from India-rubber, and consists in filling such ware, as balls, &c., to a certain extent, with water, which being, during the process of vulcanization, converted into steam, exercises the necessary inside pressure to impart any desired pattern to the exterior face of the article. _Claim._—The introduction of water or any other liquid into the interior of articles which require expansive force for their perfect formation against the interior surface of moulds, said liquid to be converted into steam, substantially as, and for the purposes, specified. _Eighty-ninth_, to L. Otto P. Meyer, April 4, 1854. For improvement in treating caoutchouc and other vulcanizable gums. The interposing between sheets of gum, &c., to be cured, sheets of flexible material, when the series of sheets thus piled are confined between plates of iron during the process of vulcanization, being disclaimed, the improvement and claim are restricted to covering the surface of what is known as the hard compound of caoutchouc with tin foil, or other equivalent substances, to preserve the form previously given by embossing or moulding, the contact of the tin foil during the curing process having the effect to preserve the form and the surface without pressure or moulds. _Ninetieth_, to Julius A. Pease, November 14, 1854. For improvement in over-shoes. The claim explains the character of this invention, by reference to the accompanying figure. A. represents the ribs, and B. the depressions between them. _Claim._—Making India-rubber or gum shoes with the inner surface ribbed, corrugated, or otherwise made uneven, for the purpose of allowing a circulation of air between it and the boot or shoe over which it is worn; and this, whether it be effected in the precise manner stated, or by lining the shoe with a similar ribbed, corrugated, or otherwise raised and depressed surfaced fabric, as described. _Ninety-first_, to John Murphy, May 30, 1854. For improvement in the process of treating gutta-percha. The improvement refers to the process of re-heating, as patented to John Rider, in June, 1852, and consists in mixing two ounces of sulphur with ten pounds of gutta-percha, and heating the latter to about 285° Fah., preparatory to the regular vulcanization; this amount of sulphur, although not enough to vulcanize the gum, being alleged to serve the purpose of expelling certain volatile ingredients preparatory thereto.