76 JOURNAL OF THE 
The analysis of this mineral by Dr. Baskerville” is as 
follows: 
Ratio 
SiO, 51.64 861 
Al,O, 40 001 
FeO 9,28 129 | 
MnQO 56 008 
MeO 31.93 og f° 
Coat) 045 008 | 
H,O 5.45 303 
99.43 
It is evident from the amount of H,O found, that the 
material analyzed was not pure, but was probably a mix- 
ture of the enstatite with serpentine and talc. 
As is shown by the calculations below, the ratio in the 
above analysis would be satisfied by a mixture of 44.5 
per cent. enstatite, 35 per cent. serpentine and 20.5 per 
cent. talc. The analysis is also given below after sub- 
stituting for MnO and CaO their equivalents of MgO, 
deducting Al,O, and recalculating to 100 per cent. 
44.5 per cent. 35 per cent. 20 per cent. Recalculated 
Enstatite. Ratio. Serpentine. Ratio. Talc. Ratio. Total. Analysis. 
SiOg..2442 .407 14.87 .246 13.02 .217 —52.31 52,79 
FeO; . 7.68 (205 1.84 025: 44+ - —— '9,42 ee: 
MgO... 12,50 312 13.83 .346 6.51 .163 ——32.84 32.91 
ne... = * 4.46 .246 .97 .054 — 5.43 SW | 
44.50 35.00 20.50 100,00 100.00 
ENSTATITE (BRONZITE. ) 
The occurence of this mineral in any considerable 
amount in North Carolina was first mentioned by Dr. G. 
H. Williams** who described specimens of a bronzite-di- 
opside rock, to which he gave the name websterite. 
*N. C. Geol. Survey, Bull. 11, p. 27. 
** American Geologist VI, pp. 43-4, 1890. 
+J. V. Lewis N. C. Geol. Survey, Bull. 11. p. 27. 
