﻿714 



Dr. H. Stanley Allen on an 



Table III. 

 7 =-3649 3 ; * =5-0500 ; « = -2*5000. 



i. 



\ calc. 



A obs. 



A 



1 

 2 

 3 

 4 

 6 

 8 



12 

 16 

 21 

 28 

 29 



•6499 



•4909 



•4363 



•4107 



•3881 



•3789 



•3715 



•3687 



•3672 



•3662 2 



•3661 3 



(1) -6563 H a 



(2) -4861 p 



(3) -4341 7 



(4) -4102 d 

 (6) -3889 i 

 (8) -3798 d 

 (12) -3722 j, 

 (16) -3692 „. 

 (21) -3674 



(28) -3662,1130 



(29) -3661 2 H 3 i 



-64 

 +48 

 +22 



+ 5 



- 8 



- 9 



- 7 



- 5 



- 2 

 + 01 

 + 01 



00 



•3649 3 



^ = •3646! 



+ 3-2 



the greatest A of Table III. to one or a few A.U. only ; but 

 before deciding on the introduction of two new constants, by 

 using formula (3) with k=2, I shall not spare further efforts 

 to succeed with the simpler dispersion law (3 a). The results 

 of my further calculations, together with some general con- 

 sequences of the proposed theory, will be reported in a later 

 publication. 



London, April 8, 1915. 



LXXV. An Atomic Model with a Magnetic Core. By H. 

 Stanley Allen, M.A., D.Sc, Senior Lecturer in Physics 

 at University of London, King s College *. 



IN spite of their limitations models have been of great 

 service in the development of physical theories. The 

 two models illustrating the structure of the atom that 

 have attracted most attention are those that have been 

 suggested by Sir J. J. Thomson and Sir E. Rutherford 

 respectively. Thomson's atom consists of a sphere con- 

 taining a uniform volume distribution of positive electricity, 

 in which a certain number of negatively electrified corpuscles 

 are distributed. In Rutherford's atom there is a central 



* Communicated by the Author. 



