f water, to remove traces
of alcohol. The operation is performed as follows: 10 c.c. of well
mixed milk are weighed in (or measured into) flask A, 10 c.c. of
hydrochloric acid added, and the mixture heated to boiling on an
asbestos sheet. The boiling must not exceed a minute and a half, the
fluid being shaken from time to time, and not allowed to become of a
deeper color than a dark brown [not black]. The flask is cooled, and
25 c.c. of ether added. The two flasks are connected as shown in the
figure, the tap closed, and the whole shaken for a few minutes, the
flask being vented two or three times by the opening _a_. The
apparatus is now inverted, allowed to stand five or six minutes, the
tap turned, and the dark acid liquid drawn off into flask B. By a
little shaking of the ether the whole of the acid liquid may be easily
got into the lower flask. The apparatus is again inverted, then
separated, 10 c.c. of ether are introduced into the flask B, the tap
closed, and the fluids well shaken. When the ether layer is distinct,
the acid liquor is run off, and the ether solution transferred to A.
The whole of the ether solution is washed in the apparatus two or
three times with a little water, the flask A removed to the water
bath, the ether driven off, the last traces of ether and water being
removed by placing the flask in a drying oven heated from 107 to 110 deg.
C., where it must remain at least twenty minutes. The usual cooling in
the exsiccator and weighing concludes the operation. Examples are
given showing its concordance with the Adams and other recognized
processes. Sour milk, which must be weighed in the flask, can be
conveniently analyzed; also cream, using 5 grammes cream and 10 c.c.
hydrochloric acid. (_Berichte Deutsch. Chem. Gesell._, 24, p.
2204).--_The Analyst._

* * * * *

AMERICAN ASSOCIATION--NINTH ANNUAL REPORT OF THE COMMITTEE ON INDEXING
CHEMICAL LITERATURE.[1]

[Footnote 1: From advance proof sheets of the Proceedings of the
American Association for the Advancement of Science; Washington
meeting, 1891.]

The Committee on Indexing Chemical Literature respectfully presents to
the Chemical Section its ninth annual report.

Since our last meeting the following bibliographies have been printed:

1. A Bibliography of Geometrical Isomerism. Accompanying an address on
this subject to the Chemical Section of the American Association for
the Advancement of Sci