Quart. Journ. Geol. Soc. Vol. LVII, Pl. X 









E 3280 X 12i. 



E 3279 X 12i E 3281 X 12^. 



Microscopic Sections, illustrating the Passage of Coal 



INTO Dolomite. 



BcDnosc, Collo. 



A, Strahan^ Phototiiicrogr. 



