_Thirdly_, “My invention consists in combining gutta-percha, or gutta-percha, caoutchouc, and “jintawan” with orpiment, liver of sulphur or other sulphurets, having like chemical properties, which will enable it to combine effectually with the other articles above mentioned, and afterwards subjecting the compound substance to heat, as herein described. * * A good compound for bands or tapes, is found by combining 50 parts of gutta-percha, 24 parts of “jintawan,” 20 parts of caoutchouc, and 6 parts of orpiment. I may state as a general rule, deduced from the experiments which I have made, that the proportion of orpiment, or other sulphuret used, ought not to exceed 25 per cent. * * * * * “When jintawan, or caoutchouc is used in making this compound article, the combination of the materials will be much facilitated by previously moistening the jintawan and caoutchouc, or such of them as are used, with rectified oil of turpentine, or some other solvent, so that they may be softened in the manner aforesaid. The orpimented, or sulphureted compound is next to be exposed to a heat of from 300° to 340°, for a period varying according as the temperature is higher or lower. With a heat of 300° Fahrenheit, I keep the article exposed to it for about sixty minutes; with a heat of 340°, for about fifteen minutes only. The required heat may be obtained by means either of high pressure steam, or water heated under pressure, or of hot air. * * * * * “I consider the use of sulphur to be objectionable, because of the _offensive smell which it imparts to the article_, and of the tendency which sulphur has to effervesce, or exude from the surface of it. And therefore I prefer the use of orpiment or some other sulphuret which will combine more effectually with the other component parts of the article.” * * * * * _Fourthly_, “My invention consists in a mode of rendering gutta-percha, or a combination of that substance with ‘jintawan’ and caoutchouc, or either of them, of a light, porous, and spongy texture, forming a species of artificial sponge, suitable for stuffing or forming the seats of chairs, cushions, mattresses, saddles, horse collars, buffers, and for many other useful purposes. * * * * *