INSPECTION OF FERTILIZERS 



II 



These different chemicals are good types of such goods, 

 and show that the buyer of such materials is reasonably sure 

 of getting his money's worth. 



The waste from cotton is a substance thrown away by our 

 cotton mills. It would make an excellent absorbent in the 

 stable, and is as rich in manurial constituents as marsh hay 

 or oat and rye straws. 



Two samples of superphosphates were received, one of 

 which was the common dissolved rock phosphate, known as 

 acid phosphate or plain superphosphate, while the other was 

 an imported article called double superphosphate or concen- 

 trated superphoshate. 



They are grouped together to show the great difference in 

 their composition. 



Soluble phosphoric acid. 

 Insoluble phosphoric acid, 

 Total phosphoric acid. 



The double superphosphate was received from a florist and 

 is especially valuable for greenhouse soils, as it contains little 

 else than the different forms of phosphate of lime. 



Two insecticides were analyzed as follows : 



Bowker's " Boston White," received from the Department 

 of Entomology, 



Calcium oxide .... 52.00 per cent. 

 Arsenic trioxide . . . 21.56 



Carbon dioxide .... 21.34 



Moisture ..... 3-o5 



This is essentially calcium arsenite and calcium carbonate. 

 Ferto-insectino," received from South Merrimack, N. H. 



Calcium oxide 





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