632 PUBLICATIONS RECEIVED [Vol. 75 Publications Received REPORTS ON BIOLOGICAL STANDARDS : VI. THE DESIGN OF TOXICITY TESTS. (Medical Research Council, Special Report Series No. 270.) 13y W. L. M. PERRY. Pp. vi + 51. London: H.M. Stationery Office. 1950. Price 1s. (id. THORPE'S DICTIONARY OF APPLIED CHEMISTRY. Fourth Edition. Vol. X : Plagioclase-Sodium. Pp. xi + 913. London: Longmans, Green & Co. 1950. Price L5. COLONIAL PLANT AND ANIMAL PRODUCTS. Vol. I, No. 1, January-March, 1950. Editor: G. T. BRAY, F.R.I.C. Pp. vi + 94. London: H.M. Stationery Office. Price 5s. This quarterly journal i s the successor to the Plant and Animal Products Department section of the Bulletin of the Imperial Institute. Vol. I, No. 1, 1950. Editor: E. H. BEARD, B.Sc. Pp. xvi + 120. London: H.M.Stationery Office. Price 5s. The quarterly bulletin of the Colonial Geological Surveys. COLONIAL GEOLOGY AND MINERAL RESOURCES. PRACTICAL SPECTROSCOPY. By G. R. HARRISON, Ph.D., Sc.D., R. C. LORD, Ph.D., and J. R. LOOFBOUROW, Sc.D. Pp. xiv + 605. Lortdon: Blackie & Son, Ltd. 1950. Price 35s. STRUCTURAL CHEMISTRY OF INORGANIC COMPOUNDS. Vol. I. By W. HUCKEL, D.Phi1. Pp. xii + 437. London: Cleaver-Hume Press, Ltd. New York and Amsterdam: Elsevier Publishing Co., Inc. 1950. Price 70s.; $9.00. ANALYTICAL ABSORPTION SPECTROSCOPY. Edited by M. G. MELLON. Pp. vii + 618. London: Chapman & Hall. New York: John Wiley & Sons, Inc. 1950. Price 72s.; $9.00. AN INTRODUCTION TO LABORATORY TECHNIQUE. Second Edition. By A. J. ANSLEY. Pp. xv + 288. London: Macmillan & Co., Ltcl. 1950. Price 16s. INTERIM REPORT OF THE MINISTRY OF HEALTH DEPARTMENTAL COMMITTEE ON DETERIORATION OF CAST IRON AND SPUN IRON PIPES. London: H.M. Stationery Office. 1950. Price 3s. 6d. This Report covers the scientific and technical aspects of corrosion and the extent of the problem and its implications. It suggests measures for protecting pipes in areas where the soil formation i s known to be corrosive. THE 1951 PITTSBURGH CONFERENCE ON ANALYTICAL CHEMISTRY AND APPLIED SPECTROSCOPY THIS conference will be held at the William Penn Hotel, Pittsburgh, Pennsylvania from March 5th to 7th, 1951. It is jointly sponsored by the Analytical Chemistry Group of the Pittsburgh Section of the American Chemical Society and the Spectroscopy Society of Pittsburgh. An Exposition of Modern Labor'atory Equipment will be a feature of the conference.