The Puering, Bating & Drenching of Skins

by Joseph Turney Wood

[109] Hammarsten, p. 70.

[110] Gulland, Ency. Britt. iv., p. 83.

[111] Appelius, Technische Briefe, No. 23, April 1909.

[112] Harden, see Bibliography.

[113] References to bating:

Procter. Text-book of Tanning, 1885, 184.
Der Gerber, x. (1884), 197, Mistbeizen.
Der Gerber, xv. (1889), 267.
J. Anal, and Appl. Chem., 1893, vii. 87, 95.
J.S.C.I., xii. 530, Palmer and Sandford.
Salomon, W. J., Tech. Quarter, 1892, v. 81, etc.
J.S.C.I., xii. 774, ix. 27.

[114] Harris and Gow, Jour. of Physiol., xiii. 469. G. Tammian, Zeitschr. f. Physiol. Chem., xv. 271. O. Loew., J. Prak. Chem., 37, 101. J.S.C.I., 1888, 224.

[115] This is not invariably the case: other samples of puer examined have given off NH₃ when similarly treated, but only in small quantity. A similar instance has been observed by Rideal and Orchard in the liquefaction and decomposition of gelatin by B. fluorescens liquefaciens (The Analyst, October 1897), where the quantity of ammonia produced was insignificant, amounting even after 16 days’ incubation to only 0·168 grm. of N per 100 c.c., corresponding to 0·204 grm. of ammonia.

[116] Procter, Text Book of Tanning, p. 85.

[117] According to the text books; but for later researches see Paal and Schilling, Chem. Zeit. 1895, 1487; also J.S.C.I., 1898, 589.