PLATE II. 



THIN SKCTIONS. 



Fig. 1. — .Sahlite changing into tremolite; the latter beginning to change into serpentine. From the 



loner bed at Osborns soapetone quarry, Ulaudford. x47. See pp. 87, 104. 

 Fig. 2. — Dolomite changing to serpentine. Granville. X28. See p. 110. 

 Fig. 3 — Enstatite crystal altered to serpentine, cut parallel to (001). Drawn with polarized light 



and with the light bands placed at 45- to the plane of polarization. x60. See p. 110. 

 Fig. 4. — Garnet, with complex border; from pegmatite. Northfield. Xl4. See p. 328. 

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