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 Science at Indianapolis, August, 1890, by Professor Robert B. Warder, Vice President.  Proceedings A.A.A.S., vol. xxxix.  Salem, 1890. 8vo.

2.  A Bibliography of the Chemical Influence of Light, by Alfred Tuckerman.  Smithsonian Miscellaneous Collections No. 785.  Washington, D.C., 1891.  Pp. 22. 8vo.

3.  A Bibliography of Analytical Chemistry for the year 1890, by H. Carrington Bolton.  J. Anal.  Appl.  Chem., v., No. 3.  March, 1891.

We chronicle the publication of the following important bibliography: 

4.  A Guide to the Literature of Sugar.  A book of reference for chemists, botanists, librarians, manufacturers and planters, with comprehensive subject index.  By H. Ling Roth.  London:  Kegan Paul, Trench, Trubner & Co.  Limited. 1890. 8vo.  Pp xvi-159.

This work contains more than 1,200 titles of books, pamphlets, and papers relating to sugar.  Many of the titles are supplemented with brief abstracts.  The alphabetical author catalogue is followed by a chronological table and an analytical subject index.  The compilation extends to the beginning of the year 1885, and the author promises a supplement and possibly an annual guide.