(In the Dheovevij of Natural (ras in l$asi Sussex. 349 



beirio to the boundary-fault near Melin Pant-y-gwydd, and from 

 Mynydd Mechell to Bodewryd. They dip to the north, and appa- 

 rently form a series in the following ascending- order : — (1) Highly 

 quartzose and gritty rocks. (2) A considerable admixture of softer 

 beds (hypometamorphic shales). (3) Predominating shaly strata, 

 with gritty seams in subordinate proportion. The lower beds 

 contain intercalated scams of well-foliated micaceous or chloiitic 

 schist, and in these lower beds the signs of compression and contortion 

 are most marked. 



A series of microscopic slides from Rhosbeirio, Llanfechell, 

 Pant-y-glo, and intermediate localities links together the fragmental 

 rocks with the true schists. Grains of clastic quartz are replaced 

 by * granular particles fitting into each other with foliate inter- 

 locking ma rgins' ; when in contact 'the grains are moulded into 

 each other, and welded together ' ; but when ' entirely immersed in 

 a soft matrix of mica or chlorite/ they ' still retain their sharp 

 outlines.' In the ' matrix ' the chlorite and mica-flakes arc gradually 

 enlarged. 



While ' mechanical force has been concerned in producing the 

 more intense metamorphism of the lower part of the series,' the 

 author is ' not disposed to advance this as the sole cause of the 

 changes produced.' 



3. ' On a Volcanic Series in the Malvern Hills, near the Here- 

 fordshire Beacon.' By H. D. Acland, Esq., F.G.S. 



These are the rocks described biiefly by Dr. Callaway and 

 Mr. Rutley, and afterwards more fully by the late Prof. A. H. Green. 

 They consist of tuffs, rhyolites, andesites, and dolerites or basalts. 

 The microscopic appearance of the rocks exposed in excavations for 

 a new reservoir between Tinker's Hill and Broad Down indicates 

 that they are much crushed ; indeed, the amount of infiltrated 

 calcite often causes the rhyolites to assume the aspect of limestones. 

 On Tinker's Hill there is less crushing. On Hangman's Hill there 

 are rocks allied to epidosites. 



It is suggested that the rocks may be the volcanic equivalents of 

 the piutonic rocks of the Malvern axis, faulted down and protected 

 by the bend in the axis which occurs in the neighbourhood of the 

 Herefordshire Beacon. 



June 8th— W. Whitaker, B.A., F.R.S., President, 

 in the Chair. 



The following communications were read : — 



1. ' On the Discoverv of Natural Gas in East Sussex/ By 

 C. Dawson, Esq., F.G.S.^ F.S.A. 



Inflammable natural gas was first recorded by Mr. H. Willett 

 in his 13th quarterly report of the Subwealden Exploration. 

 Another discovery was in a deep artesian boring in the stable-yard 

 of the New Heathtield Hotel. In 1896, at a site about 100 yards 

 distant from the last-mentioned locality, a boring was put down by 

 the London, Brighton, & South Coast Railway Co., the details of 

 which are given in the paper together with those of the earlier 

 Heathtield boring. From this boring gas has been escaping for the 

 last 18 months, with a pressure of not less than 151b. to the square 



