DIVISION OF CHEMISTRY 101 



SESSIONAL PAPER No. 16 *^ 



Laboratory No. 10888.— ' Ground limestone' from E. L. Co., Sydney, Cape 

 Breton, N.S., and forwarded for report as to composition and fineness. 



Analysis. 



Carbonate of lime 92.00 



M neral matter insoluble in acid 6.15 



Oxide of iron and alumina 1.5fi 



Undetermined ,29 



100.00 



These results indicate a limestone of excellent quality. The mechanical separa- 

 tion gave the following data: — 



20-05 p.c. passes through sieve having 80 meshes to linear inch. 



27-10 p.c. " " " " 40 



35-81 p.c. " " " " 20 



48-93 p.c. " " " " 10 



72.16 p.c. " " " " 5 " " 



Apparently this is coarser than much of the ground limestone used in the 

 United States. We may conclude that the finer the grinding the more immediate 

 will be the action of the limestone in the soil; on the other hand, it seems probable 

 that a fairly coarse powder has an advantage in the majority of cases, for though 

 slower, it will remain active in the soil for a longer period of years. 



Laboratory No. 16146.— W. McD., Sussex. Limestone from Havelock, Kings 

 Co., N.B., forwarded with an inquiry as to its value for grinding and use in agri- 

 culture. 



Analysis. 



Carbonate of lime 94-92 



Oxide of iron and alumina .60 



Mineral matter insoluble in acid 2-24 



Carbonate of magnesia, etc. (by difference) 2.24 



100-00 



A limestone of excellent quality and, in pulverized form, one eminently suit- 

 able for agricultural purposes. 



Laboratory Nos. lJfl55-6. — Two samples of ' waste lime ' from Randolph, N.B., and 

 forwarded by W. W. H., Fredericton, with an enquiry as to their respective values for 

 use on the land; probably occurring as refuse from lime kilns. 



A nalysis. 



No. 14155. No. 14156. 



"Blue Rock." "Magnesia." 



Per cent. Per cent. 



Carbonate of lime 34.23 25.73 



Caustic and slaked lime 43-45 30-67 



Mineral matter insoluble in acid 1-50 .19 



In fine powder (passing through .5mm. mesh) 58-60 48-22 



In coarse powder and lumps 41-40 51-78 



Both samples would be valuable for agricultural purposes but No. 14155 is the 

 better by reason of its larger lime-content and its finer condition. 



