51
JOURNAL OF CHEMICAL EDUCATION
. JANUARY.
1932
"Fundamental and Applied Research on the Physical Chemistty of Steel Making," C. H. HERTY,JR., Melals & Alloys, 1, M3-9 (1930). "Origin and Effect of Inclusions in Steel." B. M. LARSEN. M e a s & Alloys, 1, 703-13. 763-9, 819. 825 (1930). "The Carbon-Oxygen Equilibrium in Liquid Iron." H. C. VACHBRAND E. H. HAMILTON, Am. Inst. Min. & Met. Eng., Iron and Steel Div., Pub. No. 409 1931.
T a n s . Am. Soc. Stel Treating, 18, 60131 "Oxygen in Steel." M. A. GROSSMAN, (1930). "Nitrogen in Iron, Part I. On the Influence of Nitrogen an the Physical Properties of Technical Iron, Especially on the Relation to Magnetic Aging." (Ziir Frage des Stickstoffs irn technixhen Eisen I. ijber den Eintlnss dcs insbesondere iiber Stickstoffs auf die Eigenschaften des technischen Eisseine Beziehung zur rnagnetischen Alterung.) W. KOSTER,Arckiu. EisenhCUenurwen, 3, 637-58 (1930). "Nitrogen in Iron. Part 11. The Nature of the Force Influence Lines." (Zur Fragc des Stickstoffs im technixhen Eisen. 11. Das Wesen der Kraftwirkungfiguren.) W. KOSTER,Archiu. Eisenkriltenucsen, 3, 649-58 (1931). COPPER
"Experiments on Inflnence of Gases on the Soundness of Copper Ingots." N. P. ALLEN,Inst. of Metals Advance Copy. 514, 1930 (44 pages). "The System: Copper-Oxygen." (?her das System Kupfer-Sauerstoff) R. VOGELarm W. POCKBR, 2. Metallkunde. 21, 333-7, 36&71 (1929). ALUMINUM
"Gas Solubility in Pure Aluminum and Aluminum Alloy Melts." (Gaslfislichkeit in Schmelzen von Reinaluminium,und einer Aluminiumlegierungen.) WILLI CLAUS.2. Mctollkunde, 21, 268-73 (1929). J. SYXPOSIA "The Occlusion of Gases by Metals." Trans. Farday Soc., 14, Pts. 2 and 3 (1919). "Metals and Their Alloys." CHARLESVICKBRS. Published by Henry Carey Baird & Co., Inc., 1923. "Iron Oxide Reduction Equilibria." U.S. Burcalr of Mines Bull. 296 (1930). "Nitriding Symposium." Trans. Am. Soc. Steel Treuting, 16, No. 5 (1929). "Non-Metallic Inclusions in Iron and Steel." CARLB s m ~ r n t sAND HELGE L o ~ p m s r . London: Chapman & Hall, Ltd.. 1931.
BOOKS AND
Mamet has no attraction for hot iron. Although more than 300 years ago . scientists knew t h a t a red hgst piece of iron i%not attracted by a magnrt, in the intervening scars they have Iparnrd little more about the eRert of heat on magnetic propertiesof metals. One of the latest researches in this subject was reported before the American Society for Steel Treating recently by Raymond L. Sanford of the U. S. Bureau of Standards, Washington. Mr. Sanford has found that heating speeds up magnetization at first, but later, as a pime of iron becomes more thoroughly magnetized, it slows down the pmcers. I n fact, there is a definite temperature beyond which i t is impossible to make a piece of iron respond to magnetism. This temperature was determined by Mr. Sanford's tests to he about 1490 degrees Fahrenheit.-Sciace Service
