234 DR. ARTHUR RANSOME ON THE 



but this is scarcely sufficient to prove the last-named rock 

 to be the same as that seen two miles further north at 

 Fogbrook and Stockport, estimated by Mr. Hull as 1500 

 feet in thickness. 



In works of such authority as the Geological Maps and 

 Memoirs of the Survey every care should be taken to 

 ascertain the boundaries of the workable coal-fields in a 

 manufacturing district, where a supply of coal is of such 

 vital importance. A mistake under an official survey can 

 hardly be rectified by an amateur geologist like myself; 

 but it is desirable that the exact nature of this so-called 

 '^ Red-rock fault " and the true age of the Fogbrook and 

 Stockport sandstone should be more carefully investigated, 

 and, where necessary, rectified in the Government maps. 

 So far as my knowledge extends, there is no more evidence 

 of a fault between Macclesfield and Stockport, where the 

 Trias and Permian beds cover the Coal-measures, than is 

 to be found on the eastern side of the Pennine chain 

 between Sandyacre and Sunderland, where Carboniferous 

 strata disappear under Permian. 



XVIII. On the Organic Matter of Hwnan Breath in 

 Health and Disease. By Arthur Ransome, M.D., 

 M.A., M.R.C.S. 



Read February 22nd, 1870. 



The following analyses of the amount of organic matter 

 contained in human breath were made by the method of 

 water- analysis invented by Messrs. Wanklyn and Chap- 

 man. 



The aqueous vapour of the ]3rcath was condensed in a 



