Phosplioric acid, O.Or).S 



Nitrogen, 0.930 



Soluble silica, 0.018 



lusoliible silica, 4.333 



The composition of the above sample confirms the well known fact 

 that the shed leaves of our forest trees are rich in raanurial constit- 

 uents. The}' contain nearly twice as mucli nitrooen as the straw 

 of our cereals, and are only surpassed in that point by the straw of 

 some of our leguminous plants as beans, vetch, etc. In a well man- 

 aged system of forestry their removal is quite properly restricted. 



602. 



This material is proposed as an absorber in the manufacture of fer- 

 tilizers ; its nitrogen is exceptionally large for an article of this kind. 

 The exact history of the sample is not known to us. 



603. CHAFF FROM GRAIN ELEVATOR. 



Sent on from Lincoln, Mass. 



Per cent. 



Moisture at 100° C, 9.89 



Ash, 10.74 



Phosphoric acid, Q\ cts. per pound, 5.00 



Potassium oxide, A\ cts. per pound, 0.76 



Nitrogen, 15 cts. per pound, 1.62 



Insoluble matter, 6.49 

 The presence of some grain renders the material quite valuable for 

 manurial purposes. 



604. LINSEED REFUSE. (Two samples.) 

 Sent on from South Framingham, Mass. 



Per cent. 



Fine. Coarse. 



Moisture at 100° C, 6.44 6.23 



Ash, 7.37 5.33 



Phosphoric acid, 6 cts., 1.525 1.188 



Potassium oxide, 4i cts., 0.679 0.802 



Nitrogen, 15 cts., 7.08 4.68 



Insoluble matter, 0.495 0.112 



