PKxl.Mag . S.S .Vol. 4.. PI. IV. 



[Copy of a diagram circulated at the Bath Meeting of the British Association in 1888. In this copy, the elements, since discovered, thai occupy the sesqui- 

 radius which was unoccupied in 1888, are inserted in their proper places.] 



PLATE III. OF A PAPER "ON THE LAW 



OF ATOMIC WEIGHTS,'' READ BEFORE THE ROYAL SOCIETY. APRIL 19, 1888, 



BY G. JOHNSTONE STONEY, M.A., DSc, F.R.S 



