GELATINOUS AND ALBUMINOUS INJECTION-MASSEs 257
The colouring-masses recommended for combination with
I the vehicle above described are made as follows:
383. Carmine Colouring-mass (Robin's formula 1).-Rub up
in a mortar 3 grammes of carmine with a little water and
i enough ammonia to dissolve the carmine. Add 50 grammes
of glycerin, and filter.
Prepare 50 grammes of acid glycerin (containing 5 grammes
of acetic acid for every 50 grammes of glycerin), and add it
I by degrees to the carmine glycerin, until a slightly acid re-
t action is obtained (as tested by very sensitive blue test-paper,
i moistened and held over the mixture).
One part of this mixture is to be added to 3 or 4 parts of
I the gelatin injection-vehicle (ante, Formula 382), or of the
glycerin-gelatin, or glycerin-alcohol vehicle described below,
. Nos. 389 and 429.
384. Ferrocyanide of Copper Injection-mass (Robin's for-
mula 2) :
Take-
(1) Ferrocyanide of potassium (concentrated
solution)     .      .       .      . 20 c.c.
Glycerin        .       .      .       . 50
(2) Sulphate of copper (concentrated solu-
tion) .       .      .       .      . 35
Glycerin        .       .      .       . 50
Mix (1) and (2) slowly, with agitation, at the moment of
injecting combine with 3 volumes of vehicle (382, 389, or 429).
385. Blue Injection-mass (Prussian-Blue) (Robin's moclfl-
cation of Beale's formula 3):
Take-
(A) Sulphocyanide of potassium (sol. sat.) . 90 c.c.
Glycerin        .       .      .       . 50
(B) Liquid perchloride of iron at 300      . 3
Glycerin        .       .      .      . 50

I ' Trait6,' p. 33.
3 Ibid., p. 35.

2 Ibid., p. 34.

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