AMERICAN PATENTS.
295
snlphonic acid to 360°, nothing wit8 obtained, but at a higher temperature, some phenol and diphenol, but no hydroquinone or resorcine. From benzoledivulphonic acid (1 : 3) potash produces, at a temperature of 270°, resorcine. Soda yields, in all cases, smaller re-
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SIllt~S.
Reports on American and Foreign Patents Relating to Chemistry.
American Yatents. Condensed from the Official Gazette of the U. S. Patent Omce, by Axno BLHR.
JIS;~W 1, 1880. 228,181,- Trenttttcnf of pr/rolruni hrhriding oil and lard oil. HENRYV. P. DRAPER. An addition of chloroform tu the oil, will keep the oil liquid at a comparatively low temperature. 228,22l.-Pnprr f o r bank notes, c l t r r b , rtr. J A M E S YANGSTER. Ruling lines across the surface of an ordinary paper with alkali, and then removing or neutralizing the alkali. 228,3OO.--Manu facture of nrfifcinl indijo-blue. ADOLFBAEYER. If a solution of B mixture of orthonitrophenylypropiolic acid, an alkali and glucose, is printed on yarn or cloth, indigo-blue is developed in and upon the fibre hy simple application of heat. 220,328.-Process
qf making artificinlpnrchment ouf of toughenedpaper.
LOUIS
H. 0.EHRHARDT. With the paper pulp is mixed silicate of soda, alum and chloride of zinc. 228,362.--Dry-ropyingprorrss. VINCENZKWAYSSER and RUDOLFHUSAK. The inventors claim the method of producing on an absorbent surface, possessing the properties of remaining moist and elastic, a transfer impression, reverse from the original writing, and then printing copies from it by pressing dry sheets of paper thereupon. 228,387.-Process
and appnrnius f o r the manufacfure Pf fcrfilizrrs.
War.
PLUYER. Refers to the drying of night soil, and to its transformation into a fertilizer. 228,389.--Solrrtio~z for elecho-deposition o/ nickel. J.4~135 POWELL. Claims a mixture of a nickel salt, pyrophosphate of soda or potash, or a mixture of pyrophosphate of soda, phosphate of nickel, bieulphite of soda and citrate of nickel and ammonia.
296
A M E R I C A S PATENTS.
!88,4(i:~.-Z'r,,dirifioi/I?. nrtr'cier hi. . w / r ' d i ~ y i /eother n~ pic+.
JOHXW. HYATT
winoveil from leather, the latter is dried and powhar is pressed in suitwlile moulds. heated to240-250 F. I)rw'iiirc of i i l i ~ i i i t .i,OOO 11)s to the square inch.
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AVGUSTE
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