.ESSAYS , 



BIOGRAPHICAL 



AND 



CHEMICAL 



BY 



SIR WILLIAM RAMSAY, K.C.B. 



COMMANDEUR DE LA LEGION D'HONNEUR 



COMMENDATORE DELLA CORONA D'lTALIA 



FELLOW OF THE ROYAL SOCIETY, ETC. 



NEW YORK 

 E. P. BUTTON ANB COMPANY 



29 WEST 23RD STREET 

 1909 



