88 DR. J. A. SMYTHE ON 



17. The Superficial Deposits and Pre-glacial Valleys of 



the Northumberland and Durham Coalfield, D. 

 Woolacott. Quar. Jour. Geol. Soc, 1905, vol. lxi., 

 pp. 64-96. 



18. The Glacial Phenomena of the Country between the 



Tyne and the Wansbeck. J. A. Smythe. Trans. Nat. 

 Hist. Soc. Northumberland, etc. 1908. Vol, iii., 

 New Ser., pp. 79-109. 



19. On the Superficial Deposits around Newcastle-on-Tyne. 



E. Merrick. Proc. Univ. Durham Phil. Soc, 1909, 

 vol. iii., pp. 141-153- 



20. Reports of Boulders Committee. Univ. Durham Phil. 



Soc. Four Reports in the Proceedings, vol. ii., 1905-6, 

 p. 271 ; vol. iii., pt. 2. 1907-8, pp. 61-62 ; vol. iii., pt. 3, 

 1908-9, pp. 175-176; vol. iii., pt. 5, 1909-10, pp. 331- 

 333- 



21. The County History of Northumberland. Geology of 



the Parishes by E. J. Garwood. 



22. Geology in the Field — The Jubilee Volume of the 



Geologists' Association. Chapter on Northumberland 

 by E. J. Garwood. 1910. Pt. 4, pp. 661-697. 



Besides these sources, some isolated facts, especially in 

 connexion with striations and the occurrence of erratics and 

 boulders, are contained in various county and parish histories 

 and in the proceedings of local societies. The Drift Maps 

 of the Geological Survey furnish valuable information on 

 striations and the distribution of boulder clay and later glacial 

 deposits. All the striations recorded in the various publica- 

 tions mentioned above, as well as many new ones personally 

 observed, have been entered on the map accompanying this 

 paper. 



In the treatment of the subject, the evidence of direction of 

 ice-movement supplied by the striations is taken first; then, 

 that deducible from the distribution and contents of the 

 boulder clay and the overlying deposits. After this, the great 



