222 



SCIENTIFIC AGRICULTURE. 



POTASH PLANTS Continued. 



Corn stalks, 72.45 6.50 18.00 



Turnips, 81.60 18.40 



Beetroots, 88.00 12.00 



Potatoes, 85.81 14.19 



The following table from Johnston, shows the composition of 

 the ashes of several grains without the straw. 



Potash and soda, 

 Lime, 

 Magnesia, 

 Oxide of iron, 

 Oxide of manganese, 

 Phosphoric acid, 

 Sulphuric acid, 

 Silica, 



101.35 93.92 98.92 100 



There appears to be some mistake in the figures of this 

 table, as will be seen on adding up the columns ; but still, for 

 want of a more accurate one we must take this as it is, being 

 sufficiently accurate for all practical purposes. 



ASHES OF THE FAECES OF THE HORSE \ ANALYSIS OF JACKSON. 



Phosphate of lime, 5.00 



Carbonate of do., 18.75 



Phosphate of magnesia, 36.25 



Silicic acid/ 40.00 



100. 



URINE OF THE HORSE '. ANALYSIS OF YAUQUELIN. 



Carbonate of lime, 1.1 



Carbonate of soda, 

 Hippurate of do. 



.9 

 2.4 



Muriate of potash, 



Urea, 



Water, 



.7 

 44-0 



50.0 



