1797' I- ^ob ashes "so called," Greenfield, Mass. 



PER CENT. 



I. 



Moisture at ioo°C.. ' 9.75 



Potassium oxide, (total),* 42.48 



Potassium oxide (soluble in water), '3i-i6 



Phosphoric acid, ( " " " ), 6.68 



Phosphoric acid (total),* . 7.08 



Calcium oxide, 2.70 



Insoluble matter, 24.15 



Nitrogen, 1.18 



1798-1800. 



I, II and III. Cotton seed meal, received from Hatfield, Mass. 



Moisture at 100° C, 

 Nitrogen, 



1801-1803. I. Genuine Peruvian guano, received from Marble- 

 head, Mass. 

 II. Meat and bone, received from Acushnet, Mass. 

 III. Tankage, received from South Lincoln, Mass. 



Moisture at 100° C, 

 Total phosphoric acid, 

 Available phosphoric acid, 

 Insoluble phosphoric acid. 

 Potassium oxide, 

 Nitrogen, 



*The material was fused with sodium carbonate and dissolved in dilute hydrochloric 

 acid for these tests. 



