ON THE GEOLOGY OF HERTFORDSHIRE. 
97 
239. - Royal Commission on Metropolitan Water Supply. Report 
of the Royal Commission appointed to enquire into the Water 
Supply of the Metropolis. Polio. London. (Herts geology, 
pp. 18-19, 23, 36-39, 49-57.) 
240. Maps, Plans, and Diagrams to accompany the Report of the 
Royal Commission on Metropolitan Water Supply. Polio. London. 
(Herts : PI. i.—Contour Map of the Thames and Lea Basins .... 
PL ii.—Geological Map of the Thames and Lea Basins .... 
PI. iii.—Geological Sections. Section Ho. 1.through 
London to the Chiltern Hills across Herts. PL xv.—Mr. R. E. 
Middleton’s Water Contour Map of part of Hertfordshire.) 
Minutes of Evidence and Appendices to the Report of the Royal 
Commission on Metropolitan Water Supply. Polio. London. See 
under the names of the Witnesses as below. 
241. Docwra, C. Min. of Evid. (Herts, p. 376.) Append .— 
Water Supply from the Lea Yalley, etc., pp. 443-444. 
242. Dawkins, Prof. W. B. Min. of Evid. (Herts, pp. 33-36.) 
Append. —Report on Supplemental Supply from Wells in the 
London Area, pp. 419-425 (chiefly Herts). 
243. Evans, Sir J. Min. of Evid. (Herts, pp. 367-375.) 
Append. —Statement [chiefly on Percolation], pp. 441-443 (Herts). 
244. Hopkinson, J. Min. of Evid. (Herts, pp. 304-307.) 
Append. —Hertfordshire Rainfall, Percolation, and Evaporation, 
pp. 374-389. Reprinted, with supplementary tables, in Trans. 
Herts Nat. Hist. Soc., vol. ix, pt. 2 (1896), pp. 33-72, pi. i. 
245. Latham, B. Min. of Evid. (Herts, pp. 277, 281.) 
246. Middleton, R. E. Append. —Report on an Inquiry into 
the alleged Depletion of Rivers, Springs, and Wells in Hertford¬ 
shire, pp. 540-669. (Geology, pp. 544, 554, 566.) 
247. Smith, TJ. A. Append. —Statement [chiefly on Springs 
and Wells], pp. 389-411. (Herts geology, p. 396.) 
248. Topley, W. Min. of Evid. (Herts, pp. 313-322.) Append. 
—Areas of the various Geological Pormations .... (Herts, p. 414 
and folding Table opposite.) 
249. Whitaker, W. Min. of Evid. (Herts, pp. 349-356, 438.) 
Append. — Memorandum on Swallow-holes in the Chalk of the 
Thames Basin, pp. 430-432. On the Chalk of the London Basin, 
pp. 433-435. (Partly Herts.) 
1894. 
250. Davis, A. M. Excursion to Elstree. Froc. Geol. Assoc., 
vol. xiii, pt. 10, p. 387. 
251. Holmes, T. Y. The Geology of the Lea Yalley. Essex 
Naturalist , vol. viii, pp. 198-201. 
252. Holmes, T. Y. Excursion to Harefield. Froc. Geol. Assoc., 
vol. xiii, pt. 10, pp. 281-283. 
253. Hopkinson, J. Reminiscences of some Rambles with the 
Hertfordshire Hatural History Society. Herts Illustr. Review, 
vol. ii, pp. 275-283. (Geology, pp. 277-282.) 
VOL. XI.—PART III. 
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