94 
THE GRANITES OF MAINE. 
low angle. In one 5-foot mass there are five of these. Sap is con- 
fined to the upper sheets. Black knots measure up to 8 inches across. 
The plant consists of 4 derricks, worked by horses or men. 
Transportation is effected by carting* a few hundred feet and load- 
ing on a lighter, which is propelled by poles a mile to a wharf where 
the blocks are laden onto schooners by means of a derrick. It is 
proposed, however, soon to propel the lighter by an engine, by which 
also the stone will be hoisted onto the schooners. 
The product is used for curbing, paving, bridges, docks, and 
" random," and finds market in Boston, Philadelphia, New York, 
and Washington. 
The W. B. Blaisdell dfc ( lorn fan y quarry is in the town of Frank- 
lin, on the southeast side of Sullivan River. Address, Franklin. 
Me. 
The granite (specimen 78, b) is a bio'tite granite of medium-gray 
Fig. 12.— Structure at W. B. Blaisdell quarry, East Franklin. 
shade and medium (inclining to coarse) even-grained texture, coi 
sisting, in descending order of abundance, of potash feldspar (mien 
cline and orthoclase), smoky quartz, soda-lime feldspar (oligoclase 
and black mica (biotite), together with accessory magnetite, zircoi 
apatite, and secondar}^ epidote and chlorite. The oligoclase is pa 
tially altered to a white mica. The feldspars are grayish, and ai 
therefore of almost the same shade as the quartz, which depriv* 
the rock of marked contrasts. It is a little lighter than specimt 
76, a, of the T. M. Blaisdell quarry, and is said to be a little softe 
Mr. E. C. Sullivan has tested the granite (78, b) with warm dilu 
acetic acid at the chemical laboratory of the United States Geologic 
Survey and finds that it contains 0.15 per cent of CaO (lime 
much MgO (magnesia), and 0.104 per cent of C0 2 (carbon dioxide 
