POTASH MANURES 147 



soluble phosphate, Is. 3d. for the insoluble 

 phosphate, and 15s. for the nitrogen, and 

 at these rates the price per ton works out 

 at 5, 11s. 3d. It is evident, therefore, that 

 the price of dissolved bones is generally at 

 least l per ton in excess of their intrinsic 

 value; and at the present market value for 

 bones of all kinds, in comparison with other 

 forms of nitrogen and phosphates, most 

 farmers will probably abstain from purchas- 

 ing them. 



Other manures, containing both nitrogen 

 and phosphate, that may be mentioned are 

 Phosphatic Guano (1-2 per cent, nitrogen, 

 up to 60 per cent, insoluble phosphate) ; 

 Fish Guano (6-8 per cent, nitrogen, 10-15 

 per cent, insoluble phosphate) ; Meat Meal 

 (6-8 per cent, nitrogen, 10-25 per cent, 

 insoluble phosphate) ; and Blood Meal 

 (10-12 per cent, nitrogen, and about 5 per 

 cent, phosphate) ; and when any of them 

 can be bought on a satisfactory basis of unit- 

 values they are worth consideration. 



The great source of the various kinds of 

 potash manure employed throughout the 

 world is the district round Stassfurt, a town 

 to the north of the Harz Mountains in the 

 centre of Germany. There, at a depth of 

 700-1500 feet, are to be found beds, two or 



