34 NEW YORK STATE MUSEUM 
sold in 1911. The value of the rock was $240,784 against $202,984 
for the preceding year. The quantity ground for land plaster was 
8213 short tons with a value of $17,779; as compared with 9959 
short tons valued at $18,508 in 1911. The remainder represented 
approximately the amount calcined for stucco and wall plaster, of 
which the product amounted to 267,889 short tons valued at 
$928,282. The corresponding total in the preceding year was 
262,249 short tons with a value of $871,106. The total value of 
the marketable products for the year thus amounted to $1,186 Bee 
as compared with $1,092,598 in I9QI1. 
Production of gypsum 
IQII IQI2 
MATERIAL EEE 
SHORT | SHORT 
ONS VEU VALUE 
Woe CUO, CFUGISs 550500 - BAO OAV ern eae | 506 274 | Soap eee 
Soldkenudetoras oe eae 144 035 $202 984 178 499 $240 784 
Ground for land plaster..... 9 959 18 508 8 213 7 7aHQ 
Wall plaster, etc. made..... 262 249 871 106 2607 889 928 282 
Potali 3 a.sn. te vee ee leer G19002 95 90u ee ee $1 186 845 
I 
The production of crude rock was contributed by relatively 
few companies, about ten in all, and was divided among the four 
counties of Onondaga, Monroe, Genesee and Erie. While in 
earlier years most of the output was made in the eastern section 
in Madison, Onondaga and Cayuga counties, by far the greater 
proportion now comes from the western deposits which are the 
basis of a prosperous ‘calcining industry. The mines of that section 
rank with the largest and best equipped of their kind in the country. 
In Onondaga county the output has fallen off in recent years, 
owing to the decline in the land plaster business, to which there 
has succeeded no commensurate development of other branches. 
Only one or two quarries are now operated out of the number that 
have been opened along the extensive outcrop of the beds. The 
present supply is derived from the vicinity of Lyndon, and mainly 
from the Severance quarry which has been worked by the Fayette- 
ville Gypsum Co., for supply of rock to calcined-plaster works in 
New York. The rest of the output from this section was used 
locally by the land plaster mills at Fayetteville and Jamesville. 
