BULLETIN OF THE BUSSEY INSTITUTION. 171 
IV. A sample warranted to contain 20% of soluble phosphoric 
acid, bought of Dr. Marquart of Bonn. 
Phosphoric acid soluble in water . : ‘ . 17.86% 
“ “ insoluble “ ‘ , ps 1.56 
Total . : : 19.42% 
The specimen gave off 18.47% of moisture at 012°, left 60.15% of ash 
when ignited, and contained 1.59% of sand insoluble in acid, 
Another analysis of No. IV., made three months later than the 
first, gave — 
Phosphoric acid soluble in water . : } . 17.83% 
3 “insoluble ‘ d ; : 1.29 
Total : oy fue , : 19.12% 
The two following samples (Nos. V. and VI.) were analyzed on the 
supposition that they were of better quality than most of the fer- 
tilizers on sale in this vicinity, in the hope of finding a really good 
domestic product to compare with the foreign article. It will be 
seen, however, on comparing the analyses with those of other Ameri- 
ean fertilizers examined in this laboratory (pages 8-15), that this 
anticipation was disappointed, and that the Portland samples belong 
to the same general class or family as those previously procured in 
Boston. 
VY. “Cumberland superphosphate,” from Portland, Maine, obtained 
in the spring of 1873 by J. R. Brewer, Esq., of Hingham. 
Moisture expelled at 212°. : : : ~ 2E.547 
Volatile matter (beside moisture) . : “ $2.15 
Ash. ‘ ‘ : ’ ‘ ’ 2 . 46.31 
— 100.00 
Of matters valuable as manure the specimen contained : — 
Soluble phosphoric acid. s bmi F y yrhi88 Y 
Insoluble ‘“ ff ; ; ‘ é ‘ 6.86 
Total = « «“ 6 La NLT a Ma diewn pst ile A 4 
Nitrogen . ; . : , . . : 2.19% 
There was no ammonia; but aad, etc., to the amount of . 6.88% 
VI. “Cumberland ammoniated bone,” from Portland, Maine, ob- 
tained in the spring of 1873 by J. R. Brewer, Esq., of Hingham. 
Moisture. 1g 7447 
Volatile matter (beside itera ye ; ‘ ; 34.13 
Ash ‘ > : ‘ , ; : ‘ . 51.16 
