412 Scientific Intelligence. 



from Rowland's, principally in the tenth place of one wave length. 

 They show that Rowland's determinations of consecutive wave 

 lengths are very close and accurate, but that there are systematic 

 errors in wave lengths far removed from each other. — Comptes 

 Hendus, cxxxiii, p. 153, 1901. j. t. 



10. Spectrum of Gases at High Temperatures. — At the late 

 general meeting of the American Philosophical Society held in 

 Philadelphia, April 4, Professor Trowbridge gave an account of 

 his work on the dissociation of gases at very high temperatures. 



The same spectrum is obtained with very powerful electric 

 discharges in oxygen, hydrogen, and rarified air. This spectrum 

 becomes a continuous one in the less refrangible portion. The 

 spectrum of argon can be obtained in tubes very carefully filled 

 with hydrogen, and probably arises from minute traces of air. 

 Singular dark lines, due to some selective reversibility in the 

 silver salt, are also noticed in the spectrum of water vapor. One 

 very marked one occurs at approximately wave length 4227. A 

 longer account of dissociations at high temperatures will soon be 

 published in this Journal. j. t. 



11. Wireless Telegraphy ; by G. W. de Tunzelmann. Second 

 edition. Pp.104. London, 1902 (Office of Knowledge).— This 

 is a simple and popular account of a subject which at the present 

 time occupies a position of peculiar interest before the public. 



12. The Laws of Radiation and Absorption. Memoirs by 

 Prevost, Stewart, Kirchhoff, and Kirchhoff and Bunsen. Trans- 

 lated and edited by D. B. Brace, Ph.D. Pp. 131. New York, 

 1902 (The American Book Company). — The series of Scientific 

 Memoirs, under the general charge of Professor Ames, to which 

 attention has been repeatedly called in these pages (see vi, 199, 

 504 ; viii, 400), has recently been enlarged by this volume on the 

 Laws of Radiation and Absorption, edited by Professor D. B. 

 Brace. It contains translations of the classical memoirs by 

 Prevost, Stewart, Kirchhoff, and Kirchhoff and Bunsen. A brief 

 biographical sketch of each author is also given, and finally a 

 bibliography of leading papers on the subject. Physicists will 

 be gratified to learn that the continued publication of volumes in 

 this most useful series is to be looked for. 



13. Beitraege zur chemischen Physiologie und Pathologie, 

 herausgegeben von F. Hofmeister. II. Band, Heft 1/3. Braun- 

 schweig, 1902 (F. Yieweg und Sohn). — The present number of 

 Hofmeister's Beitraege contains seven communications from 

 almost as many laboratories. Of particular interest is an experi- 

 mental contribution by Hugo Wiener of Prag, in which the syn- 

 thetic formation of uric acid in both birds and mammals is appar- 

 ently demonstrated. Pauli and Rona have presented the first 

 part of an extensive investigation on the behavior of colloids 

 (gelatin). A paper by Kraus and Sommer gives new evi- 

 dence that the so-called " fatty degeneration " in phosphorus 

 poisoning is to be interpreted as an infiltration process. ,The 

 Beitraege contain further papers on the chemistry of malignant 



