PROCEEDINGS OF THE GEOLOGICAL SOCIETY. I71 



Tho List of Donations to the Library was read. 



The President referred to the services of the late Dr. Duncan, 

 and suggested tliat in the name of the Society a message of cordial 

 sympathy should be sent to Mrs. Duncan on the great loss which 

 had befallen her. This i)roposal was approved by the Fellows 

 present; and the Secretary was requested to communicate with 

 Mrs. Duncan. 



The names of certain Eellows were read out for the first time, in 

 conformity with the Bye-laws, Section YI. Article 5, in consequence 

 of the non-payment of arrears of contributions. 



The following communications were read : — 



1. " Note on some Recent Excavations in the Wellington College 

 district." By the Rev. A. Irving, B.A., D.Sc, F.G.S. 



[Abstract.] 



This paper furnishes new facts of Bagshot stratigraphy obtained 

 from open sections since the Author's last paper was read on Nov. 

 12th, 1890. The whole sequence of the beds, as given in the 

 published section of the College Well, has now been verified at their 

 respective outcrops ; percentages of clay in the beds laid open in 

 excavations in March last along the critical portion of the ground 

 are given as results of mechanical analyses of samples of them ; and 

 the northerly attenuation of the green-earth series and of the quartz- 

 sand series is reduced to a question of mere measurement, for which 

 the requisite data are now to hand. 



The Author claims to have demonstrated that the mapping of the 

 Geological Survey contradicts itself ; that later workers in adopting 

 this as the basis of their work along the South-E astern Railway have 

 fallen into serious error ; and that a complete contradiction is given 

 by the facts to the adverse criticisms offered on his corrected section 

 along the railway, which was exhibited in November last, and is re- 

 produced for the present paper. 



Discussion. 



Mr. Monckton thought the line of argument adopted by the 

 Author to prove the thinning-out of the green-coloured bef^s of the 

 Middle Bagshot was scarcely applicable to such variable strata as 

 the Eocene. The Author laid great stress on percentages of clay ; but, 

 as clay constantly occurs in the Lower Bagshot, that class of evidence 

 is of Uttle value. 



