252 MINERALS FOR THE PARIS EXHIBITION. GILPIN. 



The coals of Pictou County are represented by samples from- 

 the mines of the Acadia Coal Company. These deposits have 

 long been worked. Samples of coal are also shown from the 

 Chignecto, Jogoins and Springhill Colleries. Interesting 

 analyses, etc., of the seams found at the last-named district have 

 been furnished by me in late numbers of the Transactions of the- 

 Institute. 



Manganese. 



At present the production of manganese is at a low ebb i 

 this province. For many years the Tenny Cape Mines had a. 

 world-wide reputation for the production of small amounts of 

 extremely pure ore. For some time past little ore has been 

 mined. It is not doubted that the resources of the district are 

 exhausted ; but the researches of the chemist have pointed out 

 methods for the production of pure manganese oxide as a by 

 product, which have lessened the demand for a native ore almost 

 chemically pure. However the demand for manganese for steel 

 making purposes has again offered a market for manganese ores> 

 high in grade, and phosphorus free. Attention is now being 

 directed to the ores of this district, and with modern appliances 

 for prospecting and mining it is anticipated that Tenny Cape 

 will again become a producer. The samples collected exhibit 

 well the celebrated crystalline pyrolusite characterising the 

 district. 



The following analysis will serve to show the character of 

 the ores of this district, which occur in lower carboniferous 

 limestones : 



I. II. 



Moisture 1.66 2.05 



Water of Composition 3.63 .... 



Iron peroxide 603 2.55 



Oxygen 7.036 



Baryta 724 1.12 



Insoluble 1.728 2.80 



Phosphoric acid 1.029 



Manganese oxides 84.620 .... 



Peroxide of manganese 90.15 



Lirne.. trace. 



