QUARRIES IN LINCOLN COUNTY. 14 L 
Geological Survey, finds that this granite contains 0.045 per cent of 
C0 2 (carbon dioxide) corresponding to a content of 0.10 per cent 
of CaCo.. (lime carbonate), and that warm dilute acetic acid extracts 
from it 0.11 per cent of CaO (lime). This granite contains spo- 
radic particles or crystals, up to one-fourth or even one-half inch in 
diameter, of a milk-white mineral, which weathers readily, becoming 
yellowish and powdery, and finally leaves cavities. Dr. George P. 
Merrill, head curator of geology at the United States National 
Museum, has examined this mineral, and finds it to be a feldspar 
lying between albite and oligoclase — that is, containing between 6 
and 11 per cent of soda, therefore a little more soda than the soda- 
lime feldspar of the granite itself, which is 5 to 5.5 per cent, and 
that the powdery material is very near kaolin. But he does not 
regard his results as perfectly satisfactory, nor does he understand 
why such a feldspar should weather so readily. The slightly higher 
percentage of soda indicated does not seem to him an adequate cause 
for the weathering, although minerals rich in soda do weather with 
comparative facility. Workmen report that when fi *st decomposing 
this mineral protrudes beyond the granite surface. 
The following analysis of the granite was made by Ricketts & 
Banks, of New York, for the firm (No. 10074), and is given merely 
ior reference : 
Analysis of granite from Waldoboro quarry. 
Per cent. 
Si0 2 (silica) 73.48 
A1 2 3 (alumina) 15.2(3 
,FeO (ferrous oxide) 1. 42 
CaO (lime) 0.88 
MgO (magnesia) 0. 09 
MnO (manganese oxide) 0.10 
Na 2 (soda) 3.12 
K 2 (potash) ___ 5.66 
S (sulphur) total . Trace. 
j C0 2 (carbon dioxide) None. 
100. 01 
The following test of compressive strength of Waldoboro granite 
was made by Prof. Ira H. Woolson of the Columbia University School 
of Mines: Number of test, 1714; crushing strength, 23,111 pounds 
per square inch. 
The quarry, which was opened in 1860, measures 400 (N. 52° E. to 
S. 52° W.) by 140 feet across, and is of 60 to 85 feet deep. Its drain- 
age requires pumping for about two hours a day and this supplies the 
boilers. There is no stripping. 
a Published by William C. Day in Twentieth Ann. Rept. U. S. Geol. Survey, pt. 6, con- 
tinued (1890). p. 391. 
