ARRANGED FOR A COMMITTEE OF THE ROYAL SOCIETY 

 UNDER THE SUPERINTENDENCE OF 



HERBERT M C LEOD, LL.D., F.R.S. 



DIRECTOR OP THE CATALOGUE 

 with the assistance of 



ALICE EVERETT, M.A., R. HARGREAVES, M.A., 

 AND W. MARSHALL WATTS, D.Sc. 



