The Puering, Bating & Drenching of Skins

by Joseph Turney Wood

Fraction		Weight of Salts	Weight of BaSO4	Per Cent. of BaSO4
I.		0·7260	0·6535	90·01
II.		0·8150	0·7410	90·92
III.		2·1525	2·1342	99·15
IV.		0·3695	0·3627	98·16
V.		0·3530	0·3500	99·15

Calculation of Barium Salts as Barium Butyrate, Acetate, and Formate.

—		Ba Butyrate	Ba Acetate	Ba Formate
I.		0·0597	0·6663	..
II.		0·0223	0·7927	..
III.		..	0·6662	1·4863
IV.		..	0·1469	0·2226
V.		..	0·1070	0·2440
Totals		0·0820	2·3791	1·9529

Equivalent to 0·0463 grm. butyric acid.
"     1·1186  " acetic  "
"    0·7828 " formic  "

or one-half of these quantities per litre of the fermented liquid.

Note.—Mr. Adrian J. Brown, of Burton-on-Trent, has been kind enough to examine a sample of the glucose used in the above fermentations, and found the rotary power to be equivalent to 95·6 per cent. pure dextrose. The zinc salt of the lactic acid produced had no rotary power.

The Gases.—In dealing with the gases evolved, we first compare those given off in the fermentation of glucose with that of bran under exactly similar conditions. The fermentation was conducted in open vessels as before described,[181] and the gases were collected and examined in the same way.

Mean of three Analyses.

—	Bran and Skins	Glucose and Skins
CO2	25·2	24·5
O2	2·1	1·5
H2	46·7	49·8
N2	26·0	24·2