622 



BOARD OF AGRICULTURE. 



[Jan. 



Sea-weed Ashes. 



Per cent. 



Moisture at 100° C 1.47 



Calcium oxide, « . . 6.06 



Magnesium oxide, 4.37 



Potassium oxide, .92 



Sodium oxide, 8.76 



Phosphoric acid, .30 



Sulphuric acid, 2.98 



Sulphur, .14 



Chlorine, 6.60 



Magnesium chloride, .14 



Insoluble matter, 63.65 



Rockweed. 

 [I. Collected in May. II. Collected in December.] 



