212 ANALYSES OF ROCKS AND MINERALS, 1880-1908. 
J. Slate from Guilford, collected for the educational series of rock specimens. 
Analysis by L. G. Eakins, record No. 1316. 
K. Slate from the Lakeshore quarry, Hydeville. Analysis by Eakins, record 
No, 1159. 
NEW YORK. 
Roofiing slates from Washington County, collected by T. Nelson Dale. Of Cambrian 
age. Described by Dale in 19th Ann., pt. 3. 
A. Red, three-fourths mile south of Hampton Village. 
B. Empire Red Slate Company, near Granville. 
C. National Red Slate Company, Granville. 
D. Green, three-fourths mile northwest of Janesville. 
Analyses by W. F. Hillebrand, record No. 1567. 
\ 
A. B Cc. Dz 
67.61 | 67.55} 56.49 | 67.89 
13.20 | 12.59] 11.59) 11.03 
5.36| 5.61) 3.48] 1.47 
1.20} 1.24) 142] 3.81 
3.20) 3.27) 6.43 4.57 
u 126; 5.11 1.43 
.67 61 52 a 
4.45| 4.13] 3.77] 2.82 
= 45 ‘ 87 .36 
2.97} 3.03] 282] 3.21 
“AB: - 48 . 49 
-05| 10 +09 -10 
-10 19 +30 -16 
04 31 06}. .04 
none ll 7.42 1.89 
03 04] 03 04 
100.00 | 100.02 | 100.38 | 100.08 
All contain traces of lithia, of sulphates, and of nickel or cobalt. No carbonaceous matter is present. 
