186 Di::!ribii!lun of Inorganic Matter in Vegetables. [April, 



excess, which dissolves the phosphates of lime and magnesia, and 

 leaves the phosphate of the peroxide of iron untouched. This 

 is separated from the filtrate by prepared filters, dried, ignited and 

 weighed. The lime is afterwards precipitated by oxalate of am- 

 monia, and the magnesia by phosphate of soda and ammonia. 

 The carbonates of lime and magnesia are obtained in the usual 

 w^ay, after the separation of the phosphates. The chlorine, sul- 

 phuric acid, potash and soda, are obtained by the ordinary well 

 known methods. 



15. Per cent of water, wood, ash, etc., referred to in section 12. 



While Oak — (^Quercus alba.) 



Heart wood. Sap wood. 



Percent of water, - - 30.90 35.44 



drv wood, - - 69.10 64.46 



ash, - - O.IS 0.64 



" organic, matter, 63.92 63.92 



Calculated dry, - - 0.261 0.991 



Bark of trunk. Do. Iwigs. 



Per cent of water, - - 27.71 40.30 



dry wood - - 72.29 59.70 



ash, - - 11.30 4.72 



" organic matter 69.39 54.98 



Calculated dry, - - 15.63 7.906 



Wood of the small )imbs. 



Per cent of water, - - - 35.00 



dry wood, . - - 65.00 



ash, .... 0.55 



" organic matter, - - 64.45 



Calculated dry, .... 0.846 



Black Walnut — [Juglans nigra.) 



Heart wood. Sap wood. 



Per cent of water, - - 45.05 38.90 



dry wood, - - 54.95 61.10 

 ash, - - 036 0.54 



organic matter, 47.285 59.936 



Calculated dry, - - 6.919 0.950 



Bark of trunk. Do. twigs. 

 Per cent of water, - - 48.75 49.26 

 dry wood, - 51.25 50.80 

 ash, - - 3.99 3.715 



Wood of twigs. 

 Per cent of water, ... - 39.65 

 " dry wood, ... 60.35 



ash, .... 1.20 



