Lime 



consequent exposure it will carbonate and lose part 

 of its value, neither is it to be recommended for use 

 on mossy pastures, unless the harmful products 

 have been oxidized beforehand. It should be 

 employed ui preference in composts, or with the 

 cleanings of ponds and ditches. It must at least lie 

 three months so that its dangerous combinations 

 can be destroyed by oxidization. Then it could be 

 employed anywhere where one would use lime, but 

 much larger quantities are required than of quick- 

 lime, and because of the extra work entailed, one 

 should never pay more than a fifth as much for it, 

 while generally speaking quicklime will be more 

 economical. 



Its composition varies according to the quality of 

 the lime employed, the length of time allowed for 

 its purification, and also the quality of the coal 

 which furnished the gas. Its value varies according 

 to the quantity of nitrogen, of carbonate and 

 sulphate of calcium, and also according to the 

 quantity of water which it contains. 



This latter varies from 21 "5 to 30 per cent. 



Here is an example of its approximate composi- 

 tion : — 



Water 



Caustic lime 



Carbonate of calcium 



Sulphites and sulphates 



Sulphur 



Various 



27 per cent. 



17 



25 



25 



4 



2 



100 



Its popularity has chiefly arisen from its smell, 

 and this — which is only the results of sulphurous 



139 



