EXPEKIMENT STATION. 79 



The ash contains : 



Potash 326 



Soda 015 



Lime .688 



Magnesia .162 



Oxideoflron 081 



Phosphoric Acid .263 



Sulphuric Acid .060 



Carbonic Acid 418 



Silica and insoluble in acid .317 



2.330 3.800 4.528 1.813 2.975 



To facilitate comparison, these analyses are reduced to a water- 

 free basis. 



Albuminoids 12.19 4.84 4.36 10.84 6.17 



Fiber 21.18 29.00 27.17 16.86 19.60 



Non-nitrogenous Extract -.. 57.50 55.98 59.06 58.99 61.93 



Ether Extract 3.76 4.76 4.36 8.75 7.93 



Ash 5.37 5.42 5.05 4.56 4.37 



100.00 100.00 100.00 100.00 100.00 



Tlie ash contains : 



Potash 75 



Soda -. .04 



Lime 1.58 



Magnesia 37 



Oxide of Iron .19 



Phosphoric Acid , .61 



Sulphuric Acid _ .14 



Carbonic Acid .96 



Silica and insoluble .73 



5.37 5.42 5.05 4.56 4.37 



The leaves gathered on Oct. 16th had very nearly finished their 

 assimilating function, those gathered Nov. 13th we may assume 

 had nearly or quite ceased to lose through resorption into the 

 wood, and those gathered March IVth represented dead leaves 

 which had been exposed to leaching and the action of frost for 

 nearly four months. 



The green oak leaves lost between one-third and one-half of the 

 percentage of nitrogen in their dry substance, between the time 



