290 AGRICULTURAL TEXT-BOOK. 



641. Inorganic analysis of the leaves of the Early Harvest 

 Apple, collected September 30 : bearing fruit. (Emmons.) 



Silica, - - 5.775 



Phosphate of iron, - 4,875 



Phosphate of lime, - - 1.416 



Phosphate of magnesia, trace 



Silica, ... - 5.125 



Phosphoric acid, - 5.359 1C 775 



Lime, - 36.398 



Magnesia, - 0.075 



Potash, - - 13.179 



Soda, 11-616 



Chloride of sodium, - 0.060 



Sulpliaric acid, N-137 



Carbonic acid, - 15.200 



Organic matter, 2.850 



PROPORTIONS. 



Water, ... - 54.341 



Dry, . - 45.659 



Ash, - 4.194 



Ash, calculated dry, - 9 - l6 3 



642. THE PEAR (Pyrus communis,) (a,) a native of Eu 

 rope, cultivated from remote antiquity; (b,) at present, Belgium 

 is celebrated for this fruit; (c,) several fine American* varieties; 

 W propagated by seeds, (for stocks,) by grafting budding- 

 dwarf pears on Quince roots; (e,) requires a soil rich in the phos 

 phates, much more difficult to cultivate than the last ; (f,) subject 

 to several diseases, from the seed to maturity, as Insect-blight, 

 Frozen-sap-Uight, &c ; (gj ripened artificially in the house, to 

 acquire perfection of flavor; (h,) brings high prices in market; 

 (i,) Perry manufacture (i,) manures, unleached ashes, bones, 

 lime, plaster, salt. 



643. Comparative analysis of the Sap-wood (A,) Heart-wood 

 (B,) Bark of Trunk (C,) of the Pear Tree, and the Wood (D,) 

 and Bark (E,) of the Root of the same. (Emmons.) 



