10 



Calcium oxide, 3.39 



Magnesium oxide, 1.12 



Nitrogen, 17 cts. per pound, 2.65 



Insoluble matter, 0.29 



Valuation per 2000 lbs., $14.66 



The composition of the above sample corresponds well with that 

 noticed on previous occasions, (see 1 Annual Rep., page 103). 



396. HAVANA TOBACCO STEMS. 



Sent on from South Deerfiel'd, Mass. 



PER CENT. 



Moisture at 100^ C, 11.85 



Phosphoric acid, 5 cts. per pound, 0.44 



Potassium oxide, 4i " " " 6.62 



Calcium oxide, 3.45 



Magnesium oxide, 1.11 



Nitrogen, 17 cts. per pound, 0.90 



Insoluble matter, 1.35 



Valuation per 2000 lbs., $8.83 



The amount of nitrogen in this sample of tobacco stems (Havana) 

 is exceptionally low ; about one third of that found in other 

 samples offered for sale in our section of the Connecticut River val- 

 ley (see II Annual Report, page 138). The difference, in nitrogen 

 causes the low valuation per ton, as compared with that of the pre- 

 ceding-analysis (396). The sample was handed to us with the 

 statement that it had been used for imparting the odor of Havana 

 tobacco to other varieties of tobacco. The odor had been removed 

 apparently by a steaming process ; for the mineral constituents, with 

 the exceptiom of the potassium oxide, correspond fairly Avith those 

 in the material described in our II Annual Report. Farmers will do 

 well to be careful in bu3ung the article without stated guarantee of 

 composition. 



ASHES OF COTTON SEED HULLS. 



397. Sent on for examination from South Deerfield, Mass. 



398. Sent on from North Amherst, Mass. 



Moisture at 100^ C, 

 Phosphoric acid, 6 cts. 

 Calcium oxide. 

 Magnesium oxide. 

 Potassium oxide, 5 J cts. 

 Insoluble matter. 



Valuation per 2000 lbs., $36.15 $39.41 



There is evidently a considerable variation in the composition of this 

 article. Direct communication from a well informed southern source 

 accounts for this fact by stating that more or less seeds are not un- 



