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many of the same kind that could be adduced in support of the 

 same view. But it does not follow that the whole mass of ice 

 over that spot moved in the same direction, or at the same rate 

 either. The differential movements of the various platforms of 

 the ice sheet did, in the case under notice, result in transporting, 

 in the higher parts of the ice, detritus primarily derived from parent 

 masses situated at almost all points of the compass in relation to 

 that particular spot, as well as, under particular circumstances, 

 transporting, at a high level, boulders in opposite directions to that 

 of their initial course. On the outskirts of the Lake District there 

 are many instances of boulders of certain rocks that have first 

 travelled outwards under the influence of the local currents, and 

 then, as they worked their way upwards in the ice and came under 

 the influences of the upper currents that were setting inland from the 

 Solway, they were swept backwards again in the ice towards the heart 

 of the mountains. (A reference to the map will make it clear that 

 "the strong upper currents setting in from Scotland" {Geol. Mag., 

 Nov., 1874,) did not move in diametrically opposite directions to 

 that of the local outflow. No one that would take the trouble to 

 read the original statements could fail to detect the travesty of my 

 views published with the above quotation.) And it was much the 

 same in some other instances in this district, as it has long been 

 known to have been the case. In the Eden Valley, as I have 

 before pointed out, there are abundant instances of this cross- 

 transportal of drift materials, and instances other than those referred 

 to will be found in the paper just mentioned. 



Relative Date of the Maximum Glaciation. — There are almost 

 no data that will enable us to form any satisfactory conclusions in 

 regard to the dates of the various phases of the Glacial Period 

 above noticed. If we may judge by the enormous quantity of 

 material that can be proved to have been carried away by the ice 

 from areas of limited extent, such, for example, as the St. John's 

 Quartz Felsite, the Shap Granite, Sale Fell "Minette," and others, 

 (which enable us to form some kind of idea of the quantity of rock 

 removed from other rocks less easily traced in the drift,) confirmed 



