BIBLIOGRAPHY OF YORKSHIRE GEOLOGY. I4I 
39 Mortimer, R. — An Account of a Well-section in the Chalk 
at the north end of Driffield, East Yorkshire. Quart. 
Journ. Geol. Soc, vol. xxxi., pp. Ill, 112. 
40 Pankhurst [E. A.]. — The Ores of Iron. 22nd Ann. 
Rep. Brighton Nat. Hist. Soc, pp. 147-152. 
41 Parker, W. K.— [See T. R. Jones]. 
42 Phillips, J. — Illustrations of the Geology of Yorkshire ; 
or, a Description of the Strata and Organic Remains. 
[Bibliography by W. Whitaker]. Ed. 3, by R. Ether- 
idge. 4to. London. 
43 Reade, T. M. — Speculation on the probable distribution of 
land and sea during the deposition of the marine boulder 
clay and sands. Proc. Liverpool Geol. Soc., vol. iii., 
pt. 1, pp. 35-52. 
44 Robertson, D. — [See G. S. Brady]. 
45 Russell, R. — The Geology of the North Yorkshire Coal- 
field. Coll. Guard., vol. xxx., pp. 563, 564. The same 
as 1873 and 1874, under different titles. 
46 Smyth, W. W. — The Ores of Iron considered in their 
Geological Relations. Coll. Guard., vol. xxix., p. 737 ; 
Mining Journ., vol. xlv., p. 550. Lecture to the Iron 
and Steel Institute, May 15th, 1875. 
47 Spon, E. — Water Supply. The present practice of Sinking 
and Boring Wells ; with Geological Considerations and 
Examples of wells executed. [Middlesbrough, pp. 163- 
165]. 8vo. London. 
48 Sorby, H. C. — On the Remains of a Fossil Forest in the 
Coal Measures at Wadsley, near Sheffield. Quart. 
Journ. Geol. Soc., vol. xxxi., pp. 458-460. 
49 Tiddeman, R. H. — Second Report of the Committee 
appointed for the purpose of assisting in the Exploration 
of the Settle Caves (Victoria Cave). Rep. Brit. Assoc. 
for 1874, pp. 133-138. Reprinted. 8vo. Lancaster. 
50 The Work and Problems of the Victoria Cave Ex- 
ploration. Proc. Yorks. Geol. Soc, vol. vi., pt. 2, pp. 
pp. 77-92. 
51 [See E. Hull]. 
52 Walker, J. F.— Oolitic Brachiopoda. [Yorkshire Coast]. 
Geol. Mag., dec. ii., vol. ii., p. 572. 
53 Ward, J. C— [See E. Hull]. 
