THE GLACIAL PERIOD. 191 



Binney, 1 Bryce, 2 Hull, 3 Morton, 4 Mackintosh, 5 De Bance, 6 

 Tiddeman, 7 Ward, 8 Goodchild, 9 and others. Mr. Tiddeman 

 gave the first connected account of the phenomena as developed 

 in North Lancashire and adjacent parts of Yorkshire and West- 

 moreland, and established the fact that the mer de glace which 

 covered those regions was compelled to flow against the " grain " 

 of the country, crossing wide and deep valleys in a S.S.E. 

 direction. This he showed was due to the fact that the great 

 ice-stream flowing outwards from the Lake District barred the 

 passage of the Lancashire ice in the direction of the basin of 

 the Irish Sea. In short, as already stated, the Scottish, Irish, 

 and English mers de glace coalesced. The course of this united 

 ice-sheet is further indicated by the glacial phenomena of the 

 Isle of Man, long ago studied by Be v. J. Cumming, 10 and 

 by those of Anglesey, as described by Brofessor Bamsay. 11 

 This latter island is striated from N.N.E, and its boulder- 

 clay contains stones which have come all the way from 

 Cumberland. 



Turning our attention now to the north-eastern borders of 

 England, we find that the rock-striee, and the carry of the stones 

 in the till of the maritime districts of Northumberland and 

 Durham, tell the same tale as those of North Lancashire — the 



1 Mem. Lit. and Phil. Soc. Manchester, 2d Ser. vol. viii. p. 195. 



2 Brit. Assoc. Rep. 1850, pp. 76, 112 ; 1855, p. 80. 



3 Edin. New Phil. Journ., 2d Ser. vol. ix. p. 31 ; Mem. Lit. and Phil. Man- 

 chester, 3d Ser. vol. i. p. 131 ; Mem. Geol. Surv. Gt. Britain, 1864. 



4 Proc. Geol. Soc. Liverpool, vols. xiv. (1860) p. 35 ; viii. (1867) p. 4 ; Brit. 

 Assoc. Rep. 1870, p. 81. 



6 Geol. Mag., vols. ii. p. 299 ; vii. pp. 349, 445, 564 ; viii. pp. 250, 303 ; ix. 

 p. 399 ; Quart. Journ. Geol. Soc, vols. xxv. p. 407 ; xxviii. p. 388 ; xxix. p. 351 ; 

 xxx. p. 174 ; xxxi. p. 692. 



6 Geol. Mag., vols. vi. p. 489 ; viii. "pp. 107, 412 ; Quart. Journ. Geol. Soc, 

 vol. xxvi. p. 641. 



7 Quart. Journ. Geol. Soc, vol. xxviii. p. 471. 



8 Ibid., vols. xxix. p. 422 ; xxx. p. 96 ; xxxi. p. 152 ; "Geology of the Lake 

 District," Mem. Geol. Surv. England and Wales. 



9 Geol. Mag., Dec. ii. vol. i. p. 496 ; Quart. Journ. Geol. Soc, vol. xxxi. p. 55. 



10 Guide to the Isle of Man, p. 249. 



11 Quart. Journ. Geol. Soc, vol. xxxii. p. 116. 



