52 Presidential Address 



has still to establish itself and to develop 

 in detail, but I anticipate that in some 

 form or other it will prove true. x 



Here is a briefest possible summary of 

 the first chapter (so to speak) of the 

 Electrical Theory of Matter. 



(1) Atoms of Matter are composed of elec- 

 trons, of positive and negative electric 

 charges. 



(2) Atoms are bound together into molecules 

 by chemical affinity which is intense elec- 

 trical attraction at ultra-minute distances. 



(3) Molecules are held together by cohesion, 

 which I for one regard as residual or differ- 

 ential chemical affinity over molecular dis- 

 tances. 



(4) Magnetism is due to the locomotion of 

 electrons. There is no magnetism with- 

 out an electric current, atomic or otherwise. 

 There is no electric current without a 

 moving electron. 



(5) Radiation is generated by every accel- 

 erated electron, in amount proportional to 

 the square of its acceleration; and there is 

 no other kind of radiation, except indeed 



1 For a general introductory account of the electrical 

 theory of matter my Romanes lecture for 1903 (Claren- 

 don Press) may be referred to. 



