Febeuaky 11, 1921] 



SCIENCE 



145 



TJw system water-'bensene-sUver perchlorate : 

 Arthur E. Hill. 



, The cryosoopy of 'boron trifluoride solutions: 

 System with piwsgene: A. F. O. Germann and 

 Vernon Jersey. (Lantern.) 



III. The cryoscopy of boron trifluoride solu- 

 tions: Systems with sulfur dioxide and with nitric 

 oxide : A. F. O. Germann and Wendell Phillips. 

 (Lantern.) 



The oryoscopy of boron trifluoride solutions: 

 System with hydrogen chloride: A. F. O. Germann 

 and Lelanb E. Smith. (Lantern.) 

 I Conductance corrections and ionic mobilities 

 from hydrated ion concentration measurements: 

 Felix A. Elliott and S. F. Agree. 



Contact potentials in hydrogen ion determina- 

 tions: (Miss) A. D. Dtjshak, Felix A. Elliott 

 and S. F. Agree. 



Titration curves of some new buffer mixtures: 

 (Miss) A. D. Dushak, Felix A. Elliott and S. 

 F. Agree. 



Investigations on gelatines. The Gold Number: 

 S. E. Sheppaed and Felix A. Elliott. 



The hydrogenation of benzene: H. S. Taylor 

 and G. Dougherty. 



i Period of induction preceding changes of hydra- 

 tion in the hydrates of cupric sulfate: Nathaniel 

 H. FuRMAN and Alan W. C. Menzies. 



Certain physical properties of three oils: Alan 

 ^. C. Menzies. 



The oxidation and luminescence of phosphorus I : 

 ^he behavior of phosphorus in pure oxygen: Harry 



B. Weiser and Allen Garrison. 



I The photochemical decomposition of gaseous 



nitrogen pentoxide: Farrington Daniels and 



Elmer JV)hnston. (Lantern.) 



I An improved method for the preparation of 



cuprous chloride and cuprous bromide: Henry C. 



Waterman and Curtis M. Parkhurst. (By 



title.) 



"Radiation as factor in chemical action": 

 Irving Langmuir. 



' ' The crystal structure of ice " : D. M. Dennison 

 and Irving Langmuir. 



' division of chemistry or medicinal products 



Charles E. Caspar!, chairman 

 I Edgar B. Carter, secretary 



A new organic arsenical and related compounds: 



C. S. Leonardi and Edward Ejiemers. Preliminary 

 experiments on the chemistry of the heptane solu- 

 tion having revealed the readiness with which the 



1 Newport Chemical Company Fellow. 



halides of the elements of the fifth and fourth 

 groups react with organic bases, the piperidine de- 

 rivatives of arsenic, antimony, silicon, and tin 

 were prepared. The reaction with arsenic tri- 

 chloride may be indicated in the following man- 

 ner: 



As OI3 + Cii H„ NH -> As (C.H10N) jAs . 3HC1. 



A preliminary pharmacological investigation of the 

 arsenic compound has been made by C. S. Leonard 

 and Julia Whelan in the laboratory of Professor 

 Loewenhart. Compounds with other bases, also 

 with other halides, have been prepared in the test 

 tube, but have not yet been obtained in suflScient 

 quantity and of desired purity for analysis and 

 further study. The continuation of this line of 

 research is contemplated. In another direction, a 

 secondary hexyl derivative of piperidine has been 

 prepared to test out a recent theory concerning the 

 length of the chain in local anaesthetics. The 

 preparation of the corresponding heptyl product 

 is under way. 



Available chlorine for disinfectant bath: L. E. 

 Sayre. Experiments with different formulEe solu- 

 tions of hypochlorite, acting upon resistant micro- 

 organisms, to ascertain what kind of solution pro- 

 duces the maximum efficiency. Experiments 

 performed to meet a demand of the Board of 

 Health of Kansas. 



On the rate of evaporation of ethyl chloride from 

 oils: Charles Baskerville and Myeon Hirsh. 



Experiences with and new applications of oil- 

 ether in anesthesia: Charles Baskerville. 



Some recent anesthetics: E. H. Volwiler. 

 Within the last year some local anesthetics have 

 been produced to replace oocain for surface an- 

 esthesia. They are the gamma di-n-butylamino- 

 propyl alcohol ester and the gamma diallylamino- 

 propyl alcohol ester, respectively, of p-aminobenzoie 

 acid. The latter is only two fifths as toxic as 

 cocain and more than twice as effective on the rab- 

 bit 's cornea. Two new local anesthetics of the 

 anesthesin type are the n-butyl and the allyl esters 

 of p-aminobenzoic acid. The former gives anes- 

 thesia of long duration, the latter very rapid an- 

 esthesia. This work has been done by the research 

 staff of the Abbott Laboratories. 



The origin and biological significance of the 

 diastases: Hugh A. McGuigan. A general study 

 of diastatie activity has been undertaken in tlie 

 attempt to determine the origin and significance of 

 the diastases. From this work and previous work. 



