126 THE GRANITES OF MAINE. 
altered to a white mica and includes a little carbonate. The quartz 
contains hairlike crystals of rutile (?). In general, as the quartz is 
so nearly clear, the bluish tint of the feldspar dominates and the con- 
trast is mostly between it and the thickly disseminated black mica. 
It takes a very fine polish. 
Mr. E. C. Sullivan, of the United States Geological Survey, finds 
dial this granite contains 0.218 per cent of C0 2 (carbon dioxide), 
and that warm dilute acetic acid extracts 0.24 per cent of CaO (lime), 
and much MgO (magnesia). Figuring the C0 2 to both CaO and 
MgO, this would give 0.43 per cent of CaC0 3 (lime carbonate) and 
0.06 per cent of MgC0 3 (magnesium carbonate). As stated above, 
the thin section also shows carbonate. 
Two tests of the crushing strength of this stone, made by the Pitts- 
burg Testing Laboratory (Limited) in March, L899 (laboratory No. 
L3396, L3397), yielded 13,000 and 15,175 pounds per square inch, and 
are given here merely for reference. 
Idie quarry, opened about IsTO. is 500 by 300 feet, and has a maxi- 
mum depth of 50 feet and an average depth of 25 feel. A very little 
pumping suffices for drainage. There is no stripping. 
Rock structure: The sheets, from 2 to 10 feet thick, strike X. 30° 
W. and. dip -jo E., and on the easl side of the quarry 20°-30° W. 
They do not con form to l lie topography of the surface. Vertical 
joint- strike N. 65 To \Y, recurring at intervals of 10 to 20 feel 
The rift is vertical, with a N. 85° W. course. There are two dikes 
of coarse pegmatite, up t<> 6 inches thick, one striking N. 15° W., the 
other X. 40° E. They consist of feldspar, quartz, muscovite, biotite, 
black tourmaline, and red garnet. The usual sap occurs along the 1 
sheets. 
The plant consists of s derricks and 8 hoisting engines, 1 overhead 
traveling electric crane of L6 tons capacity and 1 hand crane of 2 
tons capacity; two compressors (capacity 850 and 300 cubic feet 
of air pci- minute), I steam drills, 7 pneumatic plug drills, S sur- 
facers, 2 polishers (Jenny Lind), 2 small polishing lathes, 22 pneu- 
matic hand tools, and 2 steam pumps, throwing 6-inch and 4-inch 
streams. 
Transportation is effected by horse power on track 1)00-1,200 feet 
long, extending to wharf. 
The product is used for building and ornamental work. Specimen 
building-: The Hartford, Conn., and Buffalo, N. Y., post-offices; the 
Standard Oil building in New York. In 1905 the cutting plant was 
working on Stonington granite for the United States dry dock at i 
Norfolk. Ya. • 
The McConchie black- granite quarry, in the town of St. George 
about three-fourths mile north of Long Cove quarry. Operator 
George McConchie (Crown Granite AYorks) ; office, South Thomaston 
