THE MICROTOMIST' S VADE-MECUM

other bleaching solutions may of course be employed, but only
in the preparation of hard parts, as soft tissues are destroyed
by them.
480. Kreasote (Pouchet's method 1).-I gather from the
paper here quoted that most of the granular animal pigments
are soluble in kreasote. Other solvents are mentioned in this
paper (" On the Change of Colouration through Nervous
Influence "), but this appears to be the only one capable of
general histological application.
481. Nitric Acid.-Nitric acid has a similar action.
482. Oxygenated Water (Pouchet's method 2).-Macerate in
glycerin to which has been added a little oxygenated water
(5 to 6 drops to a watch-glass of glycerin). (Oxygenated
water may be procured from perfumers or hair-dressers, by
whom   it is sold as a hair dye under the name of "Aurdo-           8
line," "Golden hair-wash," or the like.)                          inth
I ' Journ. de 'Anat.,' 1876, pp. 8, et seg.         M
2 M. Duval, 'Pr6cis, &c.,' p. 234.                   mm
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300