ing, April 26 and 27, 1928, Washington, D. C. 103 pp. 17 X 25 cm. '
BOOKS RECENED-LIBRARY OF CONGRESS. MARCH 15 TO
Aita, Antonio, Gli midi inorganici; solforico, nitrico, cloridrico; fabricazione, macchinari e impianti. Milano. U. Hoepli, 1928. 3 p. I., ix-xiv pp., 1 1.,,472 pp. incl. illus., tables, diagrs. 23Ils an. Asch, Wladislaw, Die silicate in chemiscber und technischer beziehung, unter zugrundelegung der seitens der philosophischen fakultit der Universitit Gbttingen preisgekranten hexit-pentit-tbeorie nebst umwandlung derselben in eine allgemeine stereachemische theorie. Berlin, J. Springer. 1911. xv, 409, 1 p. diagrs. 24 cm. Bagsar, Aaron Bysar, Reduction of metallic chlorides by hydrogen. New York City, 1927. 50 pp., 1 I. illus., diagrs. 23 em. Thesis (Ph.D.)-Columbia University, 1928. Bennett, George Wayland, Adsorption at crystal interfaces. Menasha, Wis., 1 illus., 1928. 1 p. I., 571-581, 1 p. diagrs. 23'Ir cm. Thesis (Ph.D.)-Ohio State University, 1927. Boss, Arthur Evan, Observations on the rare earths; the atomic weight of erbium. Easton, Pa., 1928. 1 p. I., pp. 29&300, 1 1. 23'1. cm. Abstract of Thesis (PhD.1-University of Illinois, 1927. Campbell, Arthur William, Nitrogen trichloride and unsaturated hydrocarbons. iii. Nitrogen trichloride and diphenyl ketene. Easton, Pa., Mack Printing Company, 1928. 6 pp., 1 I. 24 cm. Cline, Edwin Louis, Some derivatives of ethylbenzene. Easton, Pa.. Mack Printing Company, 1928. 11, 1 p. 23'1%cm. Thesis (Ph.D.)-Johns Hopldns University, 1927.
Craig, David, Nitrogen trichloride and unsaturated ketones, Easton, Pa., Mack Printing Company, 1928. . 7, 1 pp. 1 illus. 24 cm. Thesis (Ph.D.)-University of Iowa, 1928. Dehnicke, Johames, Laboratoriumsbuch fiir die brennerei-industrie. Halle (Saale) W. Knapp, 1928. xi, 1. 392 pp. incl. illus., tables. 24'12 a. De Jong, Wieger, Over de kristalrtructuren van arsenopyriet, Borniet en Tetraedriet. Delft, Gedmkt bij de Technische boekhandel en drukkerij, 1928. 4 p. I., 43 pp. jncl. tables, diagrs. 2 pl. 24L/ncm. Elsas, Fritz, Ferngas, kammunal- und wirtschaftspolitische iiberlegungen. Berlin-Friedenau, Deutscher kommunal-verlag g. m. b. h., 1928. 27 pp. 21 cm. Ephraim, Fritz, Chemische valenz- und bindungslehre. Leipzig, Akademische verlagsgesellschaft m. b. h., 1928. viii, 366 pp. incl. tables, diagrs. 24'12 cm. Hauser, Ernst Alfred, The colloid chemistry of the rubber industry. Londo*, Oxford University Press, H. Milford, 1928. 53, 2 p. i l l u . ii I . 25 cm. Herndon, Lee Roy, The decomposition of organic compounds a t high temperatures and pressures. Easton, Pa., Mack Printing Company, 1928. 12 p., 1 I. 24 cm. Hess, John Ammon, College entrance and Regents questions and answers in chemistry. New York, College Entrance Book Company, Inc., 1928. iv p., 1 I., 169 pp. illus. 18L/9cm. Kolthoff, Isaak Maurits. L'emdoi des indicateurs color&; la d6termination colorom&ique de la concentration des ions hydrogene. Paris, Gauthier-Villars etci"., 1926. xiv, 250 p., 1 1. fold. tab., diagrs. 22'19 cm. Lange, Otto, Chemische technologic und ihre chemischen gmndlagen in leichtfasslicher form, zum selbststudinm fiir
VOL. 6, No. 5
RECENTBOOKS
nichtchemiker, ein nachschlagewerk fiit den fachgenossenl Leipzig, Akademische verlagsgesellschaft m. b. h., 1927. xix, 737 pp. illus., fold. tab., diagrs. 26 cm. Leslie, Robert Thies, Transference numben of ions in solid sodium chloride at high temperatures. Urbana, Ill., 1928. 5 pp., 1 1. 23 cm. Puente Larios, Jose de la, Nocionea inductive-experimentales de fisica y quimica, teniendo en cuenta el cuestionaria oficial. Barcelona, Libreria Bosch, 1928. 2 p. I., vii-viii, 326 p. illus. (inel. ports.; 1 wl. and mounted). 211/1 cm. Roth, Walther Adolf, Grundztige der chemie fur ingenieure. Braunschweig, F. Vieweg & Sohn akt.-ges., 1928. viii, 265 p. illus., diagrs. 23 cm. Samec, Max, Kolloidchemie der smke. Dresden und Leipzig, T. Steinkopff, 1927. xix. 509 pp. illus., diagrs. 23'12 cm. Sigmond, Elek, Mezbgazdasagi chemia. Budapest, Kir. magy. term6szettudominyi tirsulat, 1904. xi, 1,292pp. illus. 25'1~cm. Staudinger, Hermann, Tabellen zu den vorlesungen iiber allgemeiue und anorganische chemie. Karlsruhe, G. Braun, 1927. viii, 226 pp. incl. tables, diagrs. 201/z cm. Stoesser, Wesley Carl, New bromine substitution products of vanillin and some of their derivatives. Easton, Pa., Mack Printing Company, 1928. 9pp., 11. 23'/% cm. Stouder, Florence Dell, Polyhydroxymethylanthraquinones. ix. Contribution to the structure of rubiadin. Easton, Pa.. 1927. 1 p. I., pp. 2043-2045, 1 1. diagrs. 23 em. Sullivan, Joseph John, Catalytic studies on acetoacetic ester. Baltimore, 1928. 10 p., 1 1. 1 illus. 24 Em. Thesis (Ph.D.) Johns Hopkins University, 1928. Travers, Moms William, The discovery
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of the rare gases. London, E. Arnold & Co., 1928. vii, 128 p. front. (ports.) illus. (ind. facsims.) 281/r cm. .. Walden, Paul, Salts, acids, and bases: electrolytes: stereochemistry. (The George Fisher Baker non-resident lectureship in chemistry a t Cornell University.) New York, McGraw-Hill Book Company, Inc., 1929. 5 p. I., 397 pp., front. (port.), diagrs. 23% cm. Weichherz, Josef, Die malzextrakte. Berlin, J. Springer, 1928. vi, 388 pp. illus., diagrs. 23'12 cm. Weigert, h i t z , Optische methoden der chemie. Leipzig, Akademische verlagsgesellschaft m. b. h., 1927. xvi, 632 pp. illus., xvi pl. (1 col.) on 9 1. 23'/1 cm. Chemical & Metallurgical Engineering, Better production methods in chemical engineering industries; practical operating ideas for saving time and money. From "The plant notebook" of Chemical & metallurgical engineering. New York, N. Y.,,Chemical and metallurgical engineering, 1928. 256 pp. illus., diagrs. 21 cm. f
E'araday Society, London. Homogeneous catalysis; a general discussion held by the Faraday society, September, 1928. Aberd e n , The University Press, 1928. 2 p. I., pp. 545-740. illus., diagrs. 24'/r an. Hamburg. Chemisches staatsinstitut. Mittellung.aus dem Chemischen staatslahoratorium. In Jahrbuch der hamburgisfhen wissenschaftlichen anstalten. Hamburg, 1894-98. 26 cm. 11-12, 15. jahrg., 1893-94, 1897. Plates.
Hambum - Chemisches staatsinstitut. Chemisches staatslaboratorium. Bericht. 1883-1916. I n Jahrbuch der hamburgischen wissenschaftlichen anstalten. Hamburg. 1884-1917. 26 cm. 1-34. jahrg. 1883-1916. illus., plates.
U. S. Congress.
House cmnmifiec
on military affairs. Muscle Shoals Report.
Washington. U. S. Govt. Printing
Office, 1929. 35,23 p. 23 an.
U. S. Tarifl Commission. Potassium permanganite. Report of the United States Tariff commission t o the President of the United States. Differences in costs of production of potassium permanganate in the United States and in the
principal competing country, as ascertained pursuant to the provisions of section 315 of title iii of the Tariff act of 1922. Washington, U. S. Govt. Printing Office, 1928. iv, 14 pp. incl. tables. 24 a.
The Origin of Magnetism. The issue of the Physikalische Zeilschrifl for December 15th contains an account by Dr. 0. V. Auwers of recent work on the question why certain substances are magnetic and others not. According t o Heisenberg, each atom of a magnetic element must have a t least 8 neighboring atoms of the space lattice a t equal distances from it. According to the author, an examination of magnetic elements furnishes no direct contradiction to this law. But when magnetic @-ironpasses into non-magnetic p-iron, or magnetic P-nickel into non-magnetic &nickel hetween 700" and 800°C., there is no distinct change in the space lattice of either. Alloys of two of the magnetic elements, iron, nickel, and cobalt are sometimes non-magnetic although the space lattice suggests by Heisenberg's rule that they should be magnetic. On the other hand, iron pyrites and magnetite are both magnetic, although they do not wnform t o the rule. At present, therefore, we appear to have no satisfactory explanation of the origin of magnetism.-Nature (London), 123, 389 (Mch. 9, 1929). King's College, London. The centenary of King's College directs attention to an educational institution which has the distinction of being one of London's oldest alleges and the misfortune of being one of the poorest. It is the worst-endowed college in Great Britain, and yet the numbsr of students have doubled since the War, and the high standard both of its teaching and research is being steadily maintained. While the appeal for f350,OOU which has been Bunched is wide, in that it embraces the improvement of buildings, the provision of endowments, scholarships, and bursaries, there is one particular aspect which we would recommend to our readers. The College has always occupied a leading place in its work for scientific progress. I t was the first English college to establish either a physics or a bacteriological laboratory. The work done in the physics and electrical departments is particularly distinctive. Wheatstone invented the telegraph; Maxwell disclosed the principle to which broadcasting owes its origin; while in more recent times Prof. 0 . W. Richardson formulated the laws underlying the action of wireless valve filaments. Important wireless research is a t present being pursued by Prof. E. V. Appleton. The electrical industry is largely indebted to work carried on a t King's College. The theory of the parallel running of electrical alternators as used today in all the large power stations, and the invention of the three-wire system of supply, were first propounded by Prof. John Hopkinson. The present professor of electrical engineering, Prof. Ernest Wilson, has carried out important investigations on the corrosion of metals such as are used for overhead wires and are exposed to the London atmosphere. Neither the physics nor the electrical engineering departments has an endowment income. They are almost entirely dependent upon a fluctuating student fee income. I t is now proposed to raise a sum of £50,000 to endow chairs in these two departments. The amount is modest enough in comparison with the wealth of the wireless and electrical industries, and donations t o either branch of the College would be a recognition of indebtedness and an encouragement for future research.-Nature (London), 123, 421 (Mch. 16, 1929).
