486 REV. A. IRVING ON THE BAGSHOT BEDS OE BAGSHOT HEATH. 



the Author adds the following notes on sections at Farley Hill 

 which want of space had compelled him to omit from his 1888 

 paper : — 



" Farley Hill, January 20th, 1888. 



"Sandpit No. 1. 



" Sand exposed beneath the gravel, about 6 feet in irregular 

 layers; thin white sand-partings (occasionally an inch thick), 

 thin laminated pipe-clay in several of these ; some of these layers 

 in the upper 2 feet coloured by carbonized stuff. The whole 

 character of the section is that of later reconstructed Bagshot 

 material below the gravel. It admits, however, of very fair 

 lithological comparison with bed No. 4 of the Wellington College 

 section. No oblique lamination seen. 



" Sandpit No. 2. 



^' Disused gravel-pit, levelled and planted over quite recently. 

 Sand exposed in three places, with all the signs of being in situ. 

 Two of these exposures apparently fox-burrows. Upper Bagshot 

 character very strong." 



The Author adds here that in the unpublished MS. of his 1890 

 paper it will be found stated that microscopic examination brings 

 out a lithological identity between these sands at Farley Hill and 

 sands of the undoubted Upper Bagshot Beds of the North Court 

 cutting on Finchampstead Eidges. 



Hs also criticizes the remarks in the paper referred to on the 

 Pearw'ood district and about Wokingham, and challenges Mr. 

 Monckton to produce any direct evidence of such a di^ as his 

 reading of the country requires. 



DlSCFSSION^. 



The President thought that perhaps the Author was wise in 

 allowing one of the Officers to read this most controversial paper. 

 Some years ago Dr. Irving did valuable service by his observations 

 on the district to which the present paper referred, but it was 

 difficult to understand what were his present aims. He (the Pre- 

 sident) would express his own conviction that the subject was worn 

 threadbare. There was possibly some truth in the assertion that 

 the Lower Bagshots and ' green-earth series ' became attenuated in 

 a northerly direction ; but two sections quoted in the paper — viz. 

 those of Goldsworthy Hill and the Wellington College Well — were 

 diametrically opposed to this conclusion qua the ' green-earth series.' 

 Anyone interested in the Bagshot Beds knew how very variable they 

 were. Dr. Irving had apparently determined originally that the 

 Upper Bagshot Beds should overlap on to the London Clay, and this 

 supposition appeared to have affected all his subsequent work. 



Mr. Monckton referred to the papers by the Author in the 

 Quarterly Journal for 1887 and 1888, and to the folding plate by 



