ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 
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adhesion as well as by coagulation, and the method is as follows : — The 
sections are laid on the slide, covered with albumen, and pressed down 
with a brush. The slide is then put straight into toluol until the 
paraffin is dissolved. The time required for this varies with the quantity 
of paraffin (from one to five minutes). The specimen may then be 
mounted in balsam. If there be any glycerin, however little, mixed 
with the albumen, this must be removed by immersion of the slide in 
absolute alcohol for five to ten minutes. 
This method has the advantage over others in that it is shorter, and 
that the albumen is not coagulated by heat or spirit. 
(6) Miscellaneous. 
New Reaction for Albuminoids.* — Herr C. Reichl proposes the 
following test for albuminoids, which, though not so sensitive as Millon’s 
reagent, may yet be of service in micro -chemico-botanical investigations. 
Two or three drops of a dilute alcoholic solution of benzaldehyd, a 
moderate quantity of dilute sulphuric acid (equal parts of acid and of 
water), and a drop of solution of ferric sulphate, give a dark blue colour 
with an albuminoid. A light blue colour is brought out by the first 
two substances, which be comes deep blue by the action of the ferric sul- 
phate. Concentrated hydrochloric acid may be used in place of the 
sulphuric, and a different soluble iron salt, for example the chloride, in 
place of the sulphate. 
Wheatcroft, W. G. — Presidential Address to the Bath Microscopical Society. 
Journ. of Micr ., III. (1890) pp. 48-52. 
* SB. K.K. Akad. Wiss. Wien, Monatslieft f. Chemie, 1889, p. 317. See Bot. 
Centralbl., xlii. (1890) p. 367. 
