Notes and Comments. 387 



McPherson, the stone in question was not a granite, and 

 neolithic Yorkshiremen did not go outside their county for 

 their flint. 



ROCK SALT AND BRINE. 



With the above title Dr. R. L. Sherloch has written 

 Vol. XVIII. of the Special Reports on the Mineral Resources 

 of Great Britain, published by H.M. Geological Survey 

 (123 pp., 5s. net). The book collects for the first time all 

 that is known about the geology of salt in Great Britain. In 

 Chapter III. there is an account of the structure of the Cheshire 

 basin, and it is shown to be asymmetrical. The middle is 

 further east than hitherto supposed {i.e. not at Northwich, 

 but at Plumley, or further east still). The Cheshire Saltfield, 

 instead of consisting of a few square miles round each of the 

 salt towns, is a continuous area extending into Salop, and 

 comparable in size with a coalfield such as that of South 

 Lancashire. What has been supposed to be the end of the 

 salt beds is sometimes merely a fault, and at other times is a 

 deep channel filled with Drift. Every boring of which 

 reliable information is obtainable is listed, with data. The 

 salt -beds of Cheshire are correlated with those of Staffordshire, 

 Lancashire, and Worcestershire. The Middlesbrough Salt is 

 on a lower horizon. For Middlesbrough, horizontal sections 

 are given, based on Marley's records which, though published 

 in 1892, appear to have been hitherto ignored. There seems 

 no reason for ascribing a Permian Age to the salt, and the 

 evidence bears out the views the author published in 1912, 

 namely, that the ' Permian ' beds of North-east England are 

 really a lithological facies of the Trias. 



DR. T. W. WOODHEAD. 



On the unanimous vole of the Executive Committee of the 

 Yorkshire Naturalists' Union, T. W. Woodhead, Ph.D., 

 M.Sc, was elected President of the Union for 1922. Dr. 

 W'oodhead has rendered great service to the Union in con- 

 nection with his position as one of the secretaries for many 

 years, and in his ecological studies he is in the forefront as a 

 botanist. Dr. Woodhead 's work in botanical survey is well 

 known, and he is the author of many important botanical 

 memoirs, and of a valuable volume on ' The Study of Plants,' 

 published b}^ the Oxford University Press. 



THE SELBORNE SOCIETY. 



The writer recently had the privilege of being present at a 

 dinner at the Hotel Cecil, to celebrate the purchase of tlie 

 Brent Valley Bird Sanctuary — a remarkable refuge of wild life 

 lying just outside the bounds of London — as a Gilbert White 

 memorial. Lord Grey, of Falloden, who presided, said never 



a92l Dec. 1 



