DR. DAUBENY ON THE ROTATION OF CROPS, ETC. 



227 



Hemp. 



Standai'd crop grown in the Botanic Garden apart from the portion reserved for 

 the experiments. 



100 grains of the crop left 6-1 of ashes, 100 grains of which contained of — 



Charcoal and sand 7'48 



Peroxide of iron . 2-78 



10-26 



Silica 5-58 



Phosphoric acid 5-44 



Sulphuric acid 1'09 



Carbonic acid . . . 19-81 



Chloride of sodium . . . . . . . 1*72 



Soda 0-98 



Potass 13-71 



Magnesia . . . . 7'^7 



Lime . . . . 34-03 



100-29 

 10-26 



Real ingredients .... 9003 



* Viz. Ch. Sod. 1-83 = Soda 1-14. J Viz. Soda 310 



t Viz. Potass 42-00 Ch. Sod 5-7=3-06 



Ch. Pot. 5-9 = Potass 3-74 g.jg 



45-74 

 MDCCCXLV. 2 H 



