CONTENTS 



II. Calcium arsenates and arsenites ....... 89 



Materials ........... 89 



Pure acid calcium arsenate . . . . . . .89 



Commercial calcium arsenate ....... 90 



Calcium metarsenite . . . . . . . .91 



Experimental work ......... 92 



Pure acid calcium arsenate with 1 per cent milk of lime . . 92 



Commercial calcium arsenate with 1 per cent milk of lime . . 94 



Calcium metarsenite ........ 96 



III. Notes on other arsenicals ........ 96 



Magnesium arsenate ......... 96 



Zinc arsenite .......... 96 



Summary ............ 98 



