WORRY OF LEARNED MENThe Electern Hypothesis a Sou.ce of Much Concern to Electricians.IIt apparently matters much to the professors what matter is. Prof 1 Wind, of the University of Utrecht, ex ! i pounds the electern theory, which may 1 mean revolutions. It is pointed out. i that if by progress of experiment and I theory the electern hypothesis in its ! ultimate form should continue to gain ground, if it finally should prove un j avoidable to accept the view that mat- I ’ ter consists entirely of electrons, mass I and momentum would cease to be what they now are in our ideas, quantities strictly invariable. The predl- j lection and confidence with which sci ence has for centuries aimed at a de- i I scription of the physical universe in terms only of matter and motion were ! based chiefly, though half unconscious- I ly, on the idea of mass and momentum j being invariable, images or pictures of ; invariable elements of reality itself This idea, says the Chicago Tribune, ; fundamental to our whole mechanical conception of nature, would shrink into an illusion in the light of the new theory. A great advantage would be that whereas it now seems almost hopeless to involve electro-magnetic phenomena in a description in term'; onlv of matter and motion, the unity |wj desired in our picture of the physical world would then be secured by putting I it in terms of electerns and motion.I I