Association of Otficial Agricultural Chemists.--This Association was organized in the year I884. Its proceedings and methods of analysis are invaluable to workers in the fields of foods, feedstuffs, insecticides, and fertilizers. The proceedings originally appeared as Bulletins of the old Bureau of Chemistry, U. S. Department of Agriculture, but have been published since I913 in the quarterly Journal of the Association of Official Agricultural Chemists. The methods of analysis also formerly appeared as Bulletins of the Bureau of Chemistry, but are now issued in book form under the title Official and Tentative Methods of Analysis of the Association of Official Agricultural Chemists. The November, I934 number of the Journal of the Association is devoted to a name index and a subject index of all these publications from I884 to I929 inclusive. These indexes, which cover 80 pages, will be of great value to control officials and research workers in the fields covered by the Association. It is planned to issue similar decennial indexes in the future.
J. S. H.
Roman Numerals.--In a paper on Roman numerals and their uses in early manuscripts and books, CHARLES H. LA WALL (American Journal of Pharmacy, I934, CVI, 459-46I) gives the key to the symbols used for the date of imprint of books up to the latter part of the sixteenth century. The unusual symbol is the capitol C turned through I8o angular degrees--D. One thousand is represented by CID, and five hundred by ID. Thus I535 would be written CIDIDXXXV.
J. S. H.