USE OF BONE MA>'UBF. 99 



the phosphates are most readily exhausted; in bonet 

 therefore we find just the manure for restoring them, 

 and with little expense. This has been already 

 tried in some parts of the country, and with most en* 

 couraging success. I would particularly recommend 

 farmers to experiment with bones dissolved in sul» 

 phuric acid. The dissolving of them is a simple busi- 

 nesB) and can be easily shown on a small scale, by tht 

 teacher to his class. He can do it, for instance, in a 

 teacup or tumbler, or on a plate or a f" The 



cheapness of this manure is a great rt lation. 



Two bushels of bones would not certaini\ re 



tiuin $1*00; then say 60 lbs. of acid to di> >m 



would cost by the carboy, $1*50, making only $2*50 

 for a quantity auite sufficient for an acre, with half 

 the usual dressmg farm-yard manure. It would be 

 worth almost as much as this, to cart the common ma- 

 nure from the yard, to say nothing of its value. There 

 are few farms on which bones enough might not be 

 collected in the course of a year, to help out in thia 

 way the manuring of several acres. 



Bones may not only be applied successfully to the 

 ordinary cultivated crops, but also to meadows and 

 pastures. In some of the older daiir districts, a few 

 Dushels of bone du.st per acre will at once restore 

 wxmi-out pastures. The reason is, that tl nd 



cheese, which are in one form or another s' ir- 



ried away, contain considerable quantities of pboe- 

 nhates in their ash. These are rt-storetl to the land 

 oy bones. It is calculated by Prof. Johnston, that i 

 cow giving 20 quarts of milk per day, takes from the 

 soil aoout 2 lbs. of phosphate of lime or bone earth 

 in each week. There would thus be reauired three or 

 four lbs. of bones, to make goo<l this losB. If it ii 

 not made good in some way. 'i grmsMS after t 



timorpaseto flourish; being - <lby those which 



r> xs phosphate of lime, and therefore do not 



