8o NEW YORK STATE MUSEUM 



crude material and its requirements are constantly increasing. 

 The consumption of land plaster, on the other hand, remains com- 

 paratively steady from year to year. 



Present developments. In Madison county there are quarries 

 near Cotton and Hobokenville. The quarry at Cotton is owned by 

 R. D, Button. The output from this section is small, supplying a 

 local demand for land plaster. 



Onondaga county produces a large quantity of gypsum from a 

 number of quarries. The most important are situated about 2 

 miles southwest of Fayetteville in the town of Dewitt. They are 

 'Owned by the National Wall Plaster Co., Adamant Wall Plaster 

 Co., F. M. Severance and C. H. Snooks. A new quarry has been 

 opened in the same vicinity by H. H. Lansing. The gypsum has a 

 maximum thickness of 60 feet, separated into several layers of 

 different quality. It carries from 10 to 20 per cent of impurities 

 in the form of lime and magnesian carbonates and clay. The 

 output is used partly for land plaster, but the greater quantity is 

 calcined by the local cement companies or by the wall plaster works 

 in Syracuse. A portion of the calcined product is sold to Portland 

 cement manufacturers. E. B. Alvord & Co. operate a quarry at 

 Jamesville. There are properties also at Manlius Center, Mar- 

 cellus and Halfway that are intermittently active. 



The Cayuga Plaster Co. at Union Springs, Cayuga co. is one of 

 the leading producers of land plaster. 



In Ontario county there are two producers of land plaster, Ezra 

 Grinnell of Victor and Theodore Conover of Port Gibson. 



Operations in Monroe county are confined to the town of Wheat- 

 land, southwest of Rochester. The Lycoming Calcining Co. and 

 the Garbutt Gypsum Co. have properties at Garbutt. There are 

 three beds of gypsum about 6 feet apart, the upper being the one 

 most worked. The bed is reached by adits and the workings are 

 entirely underground. The Consolidated Wheatland Plaster Co. 

 is engaged in exploiting a mine 31^ miles east of Caledonia. The 

 deposit here is about 6 feet thick. This company makes a large 

 quantity of agricultural plaster, as well as plaster of paris, while the 

 others calcine the principal part of their output. Prospecting for 

 new mines was quite active in this section during the past year. 

 It is reported that options on several properties have been secured 

 by the Pittsburg Plate Glass Co. and that plans have been formu- 

 lated by the company for the erection of a mill. The Monarch 

 Plaster Co. was incorporated for the purpose of mining gypsum in 



