_One hundred and thirty-fifth_, to O. S. Boyden, and M. C. Fredericks, of Newark, N. J. For Composition for varnishing leather. We claim the employment in the compounds used in the manufacture of glazed, japanned, or painted leather, cloth, silk, and paper—either wholly or in part as a substitute for camphene or spirits of turpentine—of a paste made of the glutinous properties of flax seed, substantially as and for the purposes set forth. The compounds commonly employed for the first, or first and second coats, in the manufacture of glazed or japanned leather or cloth, is made by boiling a certain quantity of umber in linseed oil, and adding a quantity of lampblack or other coloring matter with a quantity of camphene or spirits of turpentine, about equal to one and a half times that of the linseed oil. O. S. Boyden, and M. C. Fredericks, of Newark, N. J. have invented an improvement on the above composition, which consists in the substitution either wholly or in part for the camphene or spirits of turpentine in the compound, of a paste made by boiling flaxseed, either whole or after the oil has been expressed, and either ground into meal or unground, in water till its glutinous property is extracted. The use of this paste as a substitute for camphene and spirits of turpentine not only reduces the cost of the compound, but also renders the goods more pliable, and less likely to crack. _One hundred and thirty-sixth_, to Francis Baschnagel, of Beverly, Mass., assignor to the Beverly Rubber Company. For restoring waste vulcanized rubber. I claim the application of heat from 150° to 600° Fahrenheit, to waste vulcanized rubber with or without immersing it in cold water or any other cooling fluid as specified for the purpose of restoring the same, so that it may be used again in the manufacture of India-rubber goods and substances, hereby expressly disclaiming all and every right to the application of artificial heat to new rubber, vulcanized or not vulcanized, and to the application of heat to rubber in any manner and for any purpose except as above set forth. DESCRIPTIVE INDEX OF CHEMICAL PATENTS ISSUED BY THE U. S. PATENT OFFICE, IN 1855-6. The following is an epitome of the chemical patents issued by the United States in 1855-6. It was prepared by Dr. Daniel Breed, of the U. S. Patent office. _India-rubber Cloth._—Made pervious to air but not to water by sudden drying (of fresh cement) at 160° Fahrenheit, (evaporation of camphene makes the gum porous): H. G. Tyer, and John Helm, January 2. _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.