ERKATA 



Page 62, seven lines from bottom, for Cjo read Cfo- 



" 64, nineteen lines from bottom, for KgFe (CN)6 read 

 K,Fe (CN)e. 



^' 65, eight lines lines from top, for Turnbull's read 



Prussian. 

 '• 187, eight lines from bottom, for while read whole. 

 " 143, two lines from top, for expotential read eayponentmi. 



