10 BULLETIN OF THE BUSSEY INSTITUTION. 
ammonia, 0.75%, i.e. nitrogen + 0.62% 
Total nitrogen, 2.027 ; ; 
nitrogen not in form of ammonia 1.40 
—— 2.02% 
There was sand, &c., tothe amount of . : ; : , . 6.95% 
IV. Coe’s Superphosphate, bought March, 1872, of William L. 
Bradley, Boston. 
Moisture. ; . > i o "Cena 
Volatile matter (beside moisture) . 41.86 
Ash:-:. : : . ‘ ‘ . 51.87 
100.00 
Of matters valuable as manure the specimen contained :— 
Soluble phosphoric acid , . , - 10,23 
Insoluble + Sa . ; ; 1.82 
Total “ “ . > - 12.05% 
Motal wiitromen | 1.92%) ; ammonia, 0.52%, i. e. nitrogen «0.438% 
i‘ nitrogen not in form ef ammonia 1.49 
| EN bys 
There was sand, &c., to the amount of . : 4 3 : . 4.00% 
V. “XL” Superphosphate, bought May, 1871, of William L. 
Bradley, Boston. | 
Moisture. ; : ; 4 oda 
Volatile matter (beside moisture) . 36.87 
Ash’ . ‘ : : ; ; . 55.60 
— 100.00 
Of matters valuable as manure the specimen contained : — 
Soluble phosphoric acid : se 
Insoluble. + “ee : : : ; 10.26 
Total * rs , ; : 5 15.93% 
Total nitrogen, 2.71%. = } GSNCOL One fos 1. €. nitrogen j 0.79% 
nitrogen not in form of ammonia 1.92 
aca 
There was sand, &c., tothe amount of . : ; 4 ; . 6.06% 
VI. “XL” Superphosphate, bought March, 1872, of William L. 
Bradley, Boston. 
Moisture. aa a : : . 18.55% 
Volatile matter (beside moisture). 34.38 
Ash. : . , ° . - 47,07 
100.00 
