﻿THE 

 LONDON, EDINBURGH, and DUBLIN: 



PHILOSOPHICAL MAGAZINE 



AND 



JOURNAL OF SO 



[SIXTH SEIU 



A UGUST 1922. 



XXV. On the Viscosity and Molecular Dimensions of Gaseous 

 Carbon Oxysulphide (COS). By C. J. Smith. B.Sc, 

 A.R.C.S., JD.I.C, Research Student, Imperial College of 

 Science and Technology*. 



'TPHE present research is a continuation of the work on 

 JL the measurements of the viscosities of gases, for the 

 purpose of elucidating the structure of the molecules 

 constituting them. Some measure of success has attended 

 this investigation in many cases where the necessary data 

 are known, and suggests that an accumulation of further 

 similar data may be fruitful. A case in point is that of the 

 molecule of carbon oxysulphide, and this paper describes the 

 measurements of the viscous properties of this substance. 

 which is ordinarily gaseous. The data, hitherto unknown, 

 which have been obtained, have been applied to calculate the 

 molecular dimensions in the ordinary way. 



Apparatus and Method of Observation. 



The apparatus and method, which have been used to 

 determine the viscosity of carbon oxysulphide, have recently 

 been fully described f. 



Method of Experiment. 



The viscometer was carefully standardized with a new 

 mercury pellet in the manner indicated in previous papers. 



* Communicated bv Prof. A. 0. Ranlrine, D.Sc. 



t A. 0. Rankine and C. J. Smith, Phil. Mao-. vo l. xlii. p. 60], Nov. 

 1921, and C. J. Smith, Proc. Phys. Soc. vol. xxxiv. p. 155, .June 1922. 



Phil. Mag. S. 6. Vol. 44." No. 260. Aug. 1922. U 



