The granite (specimen 85, b) is a biotite granite of general pinkishgray color and coarse, inclining to medium, even-grained texture, with sparsely disseminated biotite up to one-twentieth inch in diameter. It consists, in descending order of abundance, of a pinkish potash feldspar (orthoclase), a little less pink than that of specimen

"Tenth Census, vol. 10, 1888, p. 116.

86, from the Bodwell quarry, smoky quartz, cream-colored sodalime feldspar (oligoclase), and black mica (biotite), together with accessory magnetite and secondary white micas, zoisite, and chlorite. The orthoclase is here and there intergrown with a plagioclase. The oligoclase is largely altered to a white mica and kaolin and the biotite to chlorite. The contrasts are between the two feldspars and the smoky quartz. The stone takes a high polish, the durability of which is favored by the smallness of the biotite plates. Its general color is not quite so pinkish as that of the Bodwell quarry.

The following chemical analysis of this granite was made by Ricketts & Banks, of New York (No. 16072), and is given here merely for purpose of reference:

Analysis of granite from Jonesboro quarry.

SiO2 (silica) 72.97

Al2Os (alumina) 14.63

FeO (ferrous oxide) 1. T3

CaO (lime) X. 48

MgO (magnesia) 0.27

MnO (manganese oxide) O. lO

Na20 (soda) 3. 28

K20 (potash) 5.18

S (sulphur) O. 03

C02 (carbon dioxide) None.

Loss and undetermined 0. 33

10O. 00

The quarry is of triangular area, about 10 by 75 by 75 feet and 30 feet deep. It is or can be drained by siphoning. The stripping consists of 3 to 5 feet of till.

Rock structure: The sheets, from 5 to 10 feet thick and lenticular, lie horizontal or dip 5° NW. or 5° SE. A vertical joint striking N. 60° W. forms the wall on the southwest. A set striking N. 35°- 50° E. forms headings on the northwest and southeast and recurs at intervals of 5, 10, 20, and 70 feet. Its faces are coated with hematite. The rift is vertical, with course N. 60° W. The grain is horizontal. Knots are small and infrequent. Sap up to 3 inches thick is confined to the headings. The structural conditions are favorable for quarrying large blocks.

The plant consists of 1 derrick.

Transportation is effected along a track one-third mile to wharf on Englishmans Bay.

The quarry was idle in 1905.