127 

 Miles and Ca 3 (P0 4 ) 2 + 2H 2 S0 4 = 2CaS0 4 + 



Kilomteres. CflH 4 (P0 4 ) 2 - 



After drying, the whole mass was disintegrated 

 and mixed with proportions of hydrochloric 

 acid, ammonium sulphate, potassium and 

 sodium nitrates, and sold in various grades 

 of fertilizer from $32 to $44 per ton. 



Many accessory minerals are to be found 

 about the old dumps of this property, in- 

 cluding phlogopite, scapolite, wilsonite, pyro- 

 xene, pyrite, zircon, calcite, hornblende, and 

 many others. 



A mica deposit of the type mentioned 



in discussing the phos- 



28 m. Lacey Mica phates, lies in a southerly 



44-8 km. Mine. direction from the Foxton 



mine. Segregations in such 

 cases as the Foxton mine often contain 

 calcite, mica, and pyroxene, and form splen- 

 did sources of mica. The best deposit of 

 this kind yet discovered, and one of the 

 biggest individual mica mines in the world, 

 is the Lacey mine, which is now the property 

 of the General Electric Company of Schenec- 

 tady, New York. This mine was first op- 

 ened as a phosphate mine when the market 

 was active for that substance in 1879. It was 

 never profitable as a phosphate mine, how- 

 ever, and was converted into a mica mine and 

 worked spasmodically from 1880 to 1901 by 

 local individuals, or small companies. It was 

 then taken over and operated by the present 

 company, who obtain a product from it sur- 

 passing in quality and quantity anything that 

 had been anticipated. The property has 

 been opened to a depth of 185 feet (33-4 m.), 

 and pockets have been found 25 feet (7-6 

 m.) in width, which were almost a solid mass 

 of mica crystals. These were of enormous 

 sizes; the largest one is said to have been 

 over 9 feet (2-7 m.) in diameter. 



The mica of this mine is exceptionally well 

 suited to electrical purposes. Being light 



