142 



LESSONS IN CHEMISTRY. 



Tucker of Belfast, which were lately analyzed in my Labora- 

 tory. 100 parts of each contained as follows: — 



Water, 



Organic matters, hair, &c 



Gypsum and traces of alkalies, ... 



Carbonate of Lime, 



Carbonate of Magnesia, 



Phosphate of Lime (bone earth). 

 Sand, 



T^„„ „„A,c^ Refuse as taken 

 Dry refuse, from the boilers. 



100-0 



37-0 

 30-0 



28-4 



1-6 

 3-0 



100-0 



The dry refuse, I found, would be capable of yielding two 

 parts, and the fresh " gumps" seven parts of ammonia. The 

 moist refuse should therefore be preferred by the farmer, 

 and would prove a useful manure ; as, besides the amount of 

 ammonia which it would be capable of affording by its de- 

 composition, a ton weight of it would convey to the soil 

 about 36 lbs. of phosphate of lime (53). It must, however, 

 be expected to vary very much in composition, so that the 

 actual value of any sample can only be determined by analysis. 

 The moist refuse is sold in Belfast at 125. 6d. per ton. 



