﻿THE 

 LONDON, EDINBURGH, and DUBLIN 



PHILOSOPHICAL MAGAZINE 



AND 



JOURNAL OF SCIENCE. 



[SIXTH SERIES 



MAT 1915. 



LXVI. The Scattering and Regular Reflexion of Light by Gas 

 Molecules. — Part I. By C. V. Burton, D.Sc.* 



1. T HAVE been so much interested in reading a memoir 

 J_ by Lord Hayleigh f in the February number of the 

 Phil. Mag., that time has had to be found for the completion 

 of: this paper, which had been laid aside since last August. 

 The " simple aerial resonator vibrating symmetrically " is 

 undoubtedly more mathematically tractable than a radiating 

 molecule ; and in this paper also, problems relating to such 

 resonators (or, more generally, secondary vibrators) are con- 

 sidered by way of introduction. But, as will appear in 

 Part II., the difficulties arising from our ignorance of the 

 mechanism if of radiation can for the most part be evaded. 

 Something has, indeed, to be assumed as to the influence of 

 the orientation of the molecule on its response to incident 

 radiation, and, by way of illustration, two alternative 

 assumptions have been made, representing perhaps the ex- 

 tremes of possibility. Much of the analysis — for example, 

 that which deals with reflexion from a three-dimensional 

 multitude of vibrators — is equally applicable to the acoustical 

 and to the optical case : whichever case is in question, there 



* Communicated by the Author. 



t "Some Problems concerning- the Mutual IntUience of Resonators 

 exposed to Primary Plane Waves," Phil. Mag-. Feb. 1915, pp. 209-222. 



X If, indeed, mechanism is not a wholly improper term in this 

 connexion. 



Phil. Mag. S. 6. Vol. 29. No. 173. May 1915. L> S 



