ANNUAL PRODUCTION 8l 



least in the brown layers. The rock varies in color from 

 light drab in the cap to a dark brown and all layers appear 

 to become lighter from weathering. The so called slate 

 consists of fibrous, scaly and other forms of crystalline 

 gypsum and is essentially the purest gypsum of the series. 

 The composition is stated to be by analysis: 



i Calcium sulphate 80-90$ 



2 Calcium carbonate trace 



3 Magnesium carbonate 5% or less 



4 Clay 10$ or less 



The amount of carbonates appears to be the greatest in the 

 brown layer showing effervescence in the mass and consider- 

 able also in the cap. It is least in the crystalline mass or 

 slate beds. The rock appears to be suitable for plaster of 

 Paris or stucco for walls as samples shown were hard and 

 not brittle. Where whiteness is essential the material can- 

 not be used as the material has a gray color. 



As to the actual tonnage of gypsum per year the follow- 

 ing is an approximate list: 



Cayuga Plaster Co 10 to 12,000 tons 



Wheatland Land Plaster Co 5, 000 " 



J. W. Garbutt 4,ooo " 



Samuel Weeks 2,000 ' 



Olmsted ... 2,000 " 



F. M. Severance 4>ooo " 



Lansing & Son 2,000 ' 



Robert Dunlop 2,000 " 



All others not exceeding 4,000 



Approximate tonnage max 37»ooo 



Value of product ranges between $2.50 and $4.00 per ton. 

 Taking $2.75 as a fair average the value of the product or 

 the selling price is about $100,000. The gypsum business 

 is not as a general thing conducted on an all the year round 

 basis. The quarrying is to a large extent done by farmers 

 who work their farms in the season and employ their 

 hands in the quarries when there is little farm work to do. 

 This may account to some extent for a variation in the ton- 



