332 B^eports and Proceedings — Geological Society of London. 



2. "Note on Natural Gas at Heathfield Station (Sussex)." By 

 J. T. Hewitt, M.A., D.Sc, Ph.D. (Communicated by the President.) 



A sample of natural gas from a boring at Heathfield was taken in 

 December, 1897, analyzed with the following result: — 



Methane 91-9 



Hydrogen ... ... ... ... ... ... 7*2 



Nitrogen 0-9 



Oxygen, carbon dioxide, carbon monoxide, defines, and hydrocarbon 

 vapours were altogether absent. 



A specimen of a bed of lignite (dried at 110° Centigr.) was also 

 analyzed : — 



Carbon 



Hydrogen 

 Nitrogen 

 Sulphur ... 



Oxygen 



Ash 



100-00 100-00 



An analysis of the ash is also given in the paper. 



3. "On some High-level Gravels in Berkshire and Oxfordshire." 

 By 0. A. Shrubsole, F.G.S. 



The high-level gravels are divided by the author as follows, 

 beginning with the oldest : — 



1. Pebble -gravel, composed very largely of flint or chert. 



2. The Goring Gap gravel. 



3. Quartzose gravel, with only a small proportion of flint-pebbles. 



4. Quartzite-gravel, with pm-ple and brown quartzite- pebbles. 



5. Local iiint-gravels. 



The pebbly contents of these gravels are expressed in percentages. 

 The Pebble-gravel occurs on the higher plateaux of the Chiltera 

 Hills, and a suggestion is thrown out that it may possibly be 

 ot Diestien age. The Goring Gap gravels contain a large 

 proportion of hubangular flint. The Quartzose gravels are dis- 

 tinguished by a certain proportion of opaque and vitreous quartz- 

 pebbles and a small number of quartzite-pebbles, generally pale 

 in colour: a small flint-flake was found in them at Bowsey Hill; 

 amongst the possible sources of the constituents of this bed, old 

 pebble-beds like those of Potton and Upware are mentioned. 

 The Quartzite-gravel is widespread, and is found at heights varying 

 from 294: to 644 feet. There is a gravel-pit near Moreton-in-the- 

 Marsh, close to the source of the Evenlode, which shows an 

 exceptionally large proportion of quartzite-pebbles, both smaller and 

 larger than 6 inches in diameter. Farther on, similar gravels may 

 be traced through Evesham, up the Salwarp valley, and into the 

 Lickey district ; the author conjectures that the source of 

 the quartzite-pebbles may lie in the direction of Warwickshire 

 and the Midlands. Small flint-flakes usually having one bulb 



