108 
THE GRANITES OF MAINE. 
Contracts in 1905 : University Heights Bridge and part of the stone 
for No. 3 anchorage for Manhattan Bridge, New York. 
The Settlement quarry is on Deer Isle, on Settlement Hill cast of 
Webb Gove, 2 miles northeast of Stonington. (See map, fig. L5.) 
Operator, John C. Rodgers, 1909 Amsterdam avenue. New York. 
The granite (specimen l >w _\ a) is a biotite granite of medium gray 
slightly lavender tint, blotched with white, and of coarse texture, 
consisting, in descending order of abundance, of a very light lav- 
ender-colored 'pot ash feldspar (microcline and orthoclase), smoky 
quartz, slightly cream-colored soda-lime feldspar (oligoclase) , and 
black mica (biotite), together with accessory magnetite, titanite and 
apatite, and secondary chlorite. The potash feldspar is sometimes 
rimmed with oligoclase. The feldspars measure up to 1 inch and the 
biotite plates are under one-tenth inch. The contrast between the 
two feldspars and the mica is strong, but that between the quartz and 
(he potash feldspar is feeble. 
Fig. 19. -Structure al Settlemenl quarry, on Deer Isle, near Stonington. 
The following test of the crushing strength of this stone was madi 
by the Pittsburg 'resting Laboratory (Limited) and is given hen 
merely for reference : 
Test of crush int/ strength on 3-inch cubes of granite from Deer lsl< . 
Specimen l . 
Specimen 2. 
Specimen 3. 
Load ap- 
plied. 
roil in Is. 
151,000 
200, 600 
151,300 
Crushinl 
strengtl 
per 
square 
inch. 
Pounds. 
iti,t;io 
22, 89 
17.220 
Laboratory No. 17858, April 7. 1903; signed, John M. Bailey, Secretary. 
