1 6 Vorks/iirc Glacier-Lakes. 



a series of lakelets, connected with which are the following- set 

 of overflows : — Scug^dale and Scarth Nick, Bilsdale, Kildale, 

 Ewe Crag- Beck, Tranmire, and Egton Moor. Iburndale con- 

 tained a lakelet overflowing' eastward. Behind a narrow 

 coast-strip of country, extending- from Robin Hood's Bay to 

 Hunmanby, there runs a g-org-e which receives all the drainage 

 of the ' hinterland ' and carries it into the Vale of Pickering-. In 

 the production of this arrangement the effects of an ice-sheet 

 shutting- the seaward ends of the valleys is traceable ; the 

 position of the main overflows was stable, and the drainage was 

 permanently deflected. 



In dealing- with the sequence of the ice-movements, evidence 

 is broug-ht forward to prove that the Teesdale ice was the first 

 on the ground in question, but none of the lake phenomena 

 has been correlated with this first phase. The second phase 

 was the complete diversion of this ice in the Vale of York, 

 broug-ht about by the growth of the Scandinavian ice-sheet. 

 The third is the invasion of Scottish-Northumbrian ice, which 

 may have passed out to sea and been driven inland ag-ain, 

 carrying- flints and smashed sea shells with it, and may have 

 extended as far as Lincolnshire on the south and Whorlton on 

 the west. 



In the matter of illustration the Geological Society appears 

 to have excelled itself. Mr. Kendall's paper is accompanied by 

 no fewer than 34 illustrations in the text (maps, plans, sections, 

 etc.), three plates of photographs, and six large folding maps. 

 Undoubtedly this work constitutes ' one of the gems of glacial 

 literature.' 



The paper by Mr. Dwerryhouse is a continuation of the same 

 principles applied to another area, and is likewise an exceedingly 

 valuable piece of work. It also is illustrated by sketches of 

 sections, photographs, maps, etc. Mr. Dwerryhouse describes 

 the Topography and Structure, Glacial Deposits, Glacial Striae, 

 Boundaries of the Ice at the Period of Maximum Glaciation, 

 and the Glacial Lakes and Glacial Channels of Teesdale, Wear- 

 dale, and the Valley of the Tyne. 



The accompanying illustration, used by permission of the 

 Geological Society, is from Mr. Kendall's paper, and is a view 

 of Eller Beck and Fen Bogs from the north-west, showing 

 the ' intake ' of the Newton Dale overflow channel and the 

 contrast between the contours of the Eller Beck and Newton 

 Dale valleys. The watershed is at the sharp bend of the 

 railway. 



Naturalist, 



