114 REPORT 1875. 



The behaviour with bromine is in accordance with this view, inasmuch as 

 we find that thymolparasulphonic acid (formed by treating thymol with 

 SO3HCI) is converted by the action of bromine into bromothymolparasulphonic 

 acid, which, on further treatment with bromine, is entirely transformed into 

 dibromothymol. It must not be forgotten, however, that Lallemand has pre- 

 pared such compounds as trichlorothymol and trinitrothymol ; and these 

 bodies certainly deserve reinvestigation. 



Since meta-derivatives are under certain circumstances produced directly 

 from phenol, it is obvious that the " law " under discussion is not an absolute 

 but merely an approximate expression of experimental observations, the ap- 

 proximation to truth being, however, very close ; and the results thus far 

 obtained appear to indicate that in this sense the " law " is equally applicable 

 to the homologues of phenol. 



First Report of the Committee for investigating the circulation of the 

 Underground Waters in the New Red Sandstone and Permian Forma- 

 tions of England, and the quantity and character of the water 

 supplied to various towns and districts from these formations. The 

 Committee consisting of Professor Hull^ Mr. E. W. Binney, Mr. 

 F. J. Bramwell, Rev. H. W. Crosskey^ Professor Green, Profes- 

 sor Harkness, Mr. Howell, Mr. W. Molyneux, Mr. C. Moore, 

 Mr. G. H. Morton, Mr. R. W. Mylne, Mr. Pengelly, Professor 

 Prestwich, Mr. J. Plant, Mr. J. Mellard Reade, Rev. W. S. 

 Symonds, Mr. Tylden Wright, Mr. Whitaker, and Mr. C. E. 

 DeRance (Reporter). \ 



YoTjR Committee, endeavouring to carry out the investigation with which 

 you have entrusted them, have specialty directed their inquiries to obtain- 

 ing information as to the thickness, character, sequence, and water- 

 bearing properties of the New Eed Sandstone and Permian formations, and 

 to the nature and chemical composition of the waters derived from these 

 rocks. As special knowledge and local influence are required in each 

 particular area, youi' Reporter obtained the consent of the following mem- 

 bers of your Committee to undertake the charge of districts : — 



In the north-west of England Prof. Harkness, F.R.S., Messrs. Binney, 

 P.R.S., Morton, Mellard Eeade, and your Reporter. 



In the north-east, Prof. Green and Messrs, Howell and Fox Strang- 

 ways. 



In the Midland counties, Messrs. J. Plant, Molyneux, Tylden "Wright, and 

 the Eev. H. W. Crosskey. 



In the south-west of England, Messrs. Pengelly, E.R.S., C. Moore, and the 

 Rev. W. S. Symonds. 



Through the courtesy of Professor Ramsay, LL.D., F.R.S., Director- 

 General of the Geological Survey of the United Kingdom, and Mr. Bristow, 

 E.R.S., the Director of the English branch, instructions have been given to 

 the officers of the Survey to give your Committee any information or sections 

 they may require. The sections thus obtained from Mr. Clifton Ward are 

 incorporated in the present Report ; a large number of others have been 

 promised in the N.E. of England. 



