ADDENDA. 393 



ice-foot advancing from the north, the Syrtensian beds being deposited 

 in the ocean after the retreat of the ice. The set of the currents, for- 

 mation of lake-basins, and tidal erosion are treated of. R. B. N. 

 Mcrcey, [N.] de. Lettre a M. Gosselet relative aux communications 

 sur la craie du Pas-de-Calais, par M. E. Chellonneix. [On M. 

 Chellonneix's paper on the Chalk of the Pas-de-Calais.] Ann. 

 Soc. Geol. Novel, t. ii. pp. 120-122. 

 Notes points of detail relating to Aix-Noulette and Bouvigny. 

 Moeller, V. [On the Coal Measures discovered in the Northern Ural 



in 1872-1874.] Gornoi Journ. vol. iii. pp. 102-126, geol. map. 

 Mourlon, Michel. Sur les Terrains de la Basse Belgiques. [Belgian 

 Netherlands.] Compt. Rend. Assoc. Frang, 3 Sess. pp. 402, 403. 

 Deals chiefly with the Crag beds. (Abstract.) 



Newall, R. S. On Supplying Newcastle and District with Water 

 from Lake UUswater. Trans. N. Engl. Inst. Eng. vol. xxiv. 

 pp. 49-60. 

 Contains analysis of water from UUswater. 

 Nejrt, P. J. Lettre sur les alluvions de la Zelande. [Alluvium of 



Zealand.] Ann. Soc. Geol.Nord, t. iii. pp. 134-136. 



In the island of Nord-Beveland the alluvial beds are as follows : — 



1. Ploughed soil (| a metre below mean sea-level) ; 2. Clayey sand 



passing into pure sand with marine shells ; 3. Peat ; 4. Bluish clay ; 



5. Bluish sand. Two analyses of clays are given. G. A. L. 



Nicholson, Prof. H. AUeyne. On the Mining District on the North 

 shore of I^ke Superior. Trans. N. Engl. Inst. Eng. vol. xxiv. 

 pp. 237-248, pis. xxxix., xl. (maps, one geological). 

 Gives notes respecting the Silver Islet, Thunder Bay, Silver Harbour, 

 Silver Lake, and Shabendowan Mines. Commercial details are added. 

 Olbers, E. W. Nigra anteckningar om de losa jordaflagringarna i 

 Halland. [Drift of Halland.] Geol. Foren. Stockholm Forhandl. 

 Bd. ii. No. 26, pp. 483-490 ; map and plate of sections. 

 Olcott, Eben E. The Ore Knob Copper Mine and Reduction Works, 

 Ashe County, N. C. Trans. Amer. Inst. Min. Eng. vol. iii. 

 pp. 391-399 ; plate (section). 

 Refers to the copper- deposits of the Appalachian chain. The copper- 

 vein at Ore Knob is a true fissure- vein. Remarks by Dr. T. S. Hunt 

 are given. R. B. N. 



Ormerod, G. W. Notes on the New Red Sandstone between Maiden- 

 combe and Exeter. Rep. Teign. Nat. Club for 1874, pp. 5, 6. 



. The Dart. Ibid. pp. 14-16. 



Ortlieb, J. Observations a la note de M. DoUfus sur le contact du 

 Laekenien et du Tongrien dans les environs de Bruxelles. [On 

 M. Dollfus' note (see p. 386).] Ann. Soc. Geol. Nord, t. ii. pp. 

 140-143. 



Thinks that the upper series of the Chaussee-Louise (Brussels) is 



