Tlio 2)ul)lication, in a form accossil)lo to the ^^ciK'ral ])iil)lic, of these 
^Memoirs, witli others now in coiirs(' of ])reparation hy Mr. Etheridge, will 
not only afford valnahle works ol' ]-ef('r(‘nc(' for students and those interested 
in Australian Geology, hut must also indirectly foster the devclojmient of our 
varied mineral resources wdiieh tiic geological formations of this Colony 
indicate to he so extensive. 
The first Memoir of the Geological Scries — Geology of the Vegetable 
Creek Tin-mining Field, New England Eistrict, loiih Maps end Sections, hy 
Mr, T. W. Edgeworth David, B.A., E.G.S., Geological Surveyor; also 
Mineral Froducts of New South Whiles, Ijy Mr. llarric Wood, Under 
Secretary for Mines; Notes on the Geology of New South TFales, hy myself; 
and Description of the Seams of Coal worked in New South TVales, hy Mr. 
John Mackenzie, E.G.S., Examiner of Coal-fields, have already heen 
liuhlished. 
I have the honoi' to he. 
Sir, 
Yoiirohedient Servant, 
C. S. MALKINSOY, 
Geological Survey or -in- Charge. 
IIarrie Woon, Esq., 
Vnder-Secretary for Mines. 
