180 The Horticulturist' s Rule- Book. 



Analyses, continued. 



Potassium oxide 3.81 0,36 



Calcium oxide . * ■ 2. 73 3.86 



Magnesium oxide . . 1.48 1.30 



Sodium oxide 11.75 8.40 



Chlorine 6.40 5.28 



Insoluble matter 7.73 0.78 



38. Tobacco- Stems. 



Water 13.47 



Organic and volatile matters (containing nitrogen 1.93) . . 70.85 

 Ash (containing phosphoric acid, .53) 15.68 



100.00 



39. Dissolved Bone-Black. 

 This material is a superphosphate prepared by treating refuse 

 bone-black from sugar-refineries with oi of vitriol, which ren- 

 ders nearly all the phosphoric acid soluble in water. 



Soluble phosphoric acid 14.55 



Reverted phosphoric acid 2.39 



Insoluble phosphoric acid 0.20 



40. Bone-Black. 



Moisture at 100° C. . . . 5.04 Phosphoric acid 16.56 



Ash 67.43 Insoluble matter .... 0.37 



41. Bone Charcoal. 

 Moisture at 100° C. . . .18.16 Reverted phosphoric acid 5. IS 



Ash .72.24 Insoluble phosphoric acid 20.02 



Total phosphoric acid . .25.58 Insoluble matter .... 0.69 

 Soluble phosphoric acid . 0.38 



42. Ground Bones. (Two samples.) 



i. ii. 



Moisture at 100° C 3.97 12.43 



Ash 49.35 64.21 



Total phosphoric acid 19.49 25.67 



Reverted phosphoric acid 3.80 6.20 



Insoluble phosphoric acid 15.69 19.34 



Nitrogen 4.04 2.68 



Insoluble matter 0.78 0.42 



