390 ADDENDA. 



Helmersen, — . [Geological Sketch of the Baltic Coast from Kcinigs- 



berg to Liban.] Gornoi Journ. vol. iv. pp. 90-94 ; map. 

 The map shows Drift, Dunes, and Erratic blocks. 



Hermann, R. XJntersnchungen liber die Zusammensetzung von 

 Shepards Hermannolith. [Composition of Shepard's Herraannolite.] 

 Ball. Soc. Imp. I^at. Mosc. t. xlix. pp. 179-190. (Analyses.) 



Hilgendorf, F. [PZanorftis-bedsof Steinheim.] Zeitsch. deutsch. geol. 

 Ges. Bd. xxvii. Heft i. pp. 224-227. 



Defends his views on the distribution of the varieties of Planorhis 

 multiformis at Steinhoim. Maintains that the varieties trochiformis 

 and discoideifs occur in different beds, whilst Sandberger asserts them 

 to be associated. [See p. 96.] F. W. E. 



Islavine, W. Coal in Russia. Anncdes Industrielles, July 11, 18. 

 Abstract in Proc. Inst. Civ. Eng. vol. xlii. pp. 341-343. 



The Coal-fields of the Donetz basin of S. Eussia are divided into 4 

 groups : — 1. District traversed by the Kharkow-Azow railway ; 7 mines 

 from 24 to 58 fathoms deep, yielding 2 to 14 seams of coal, of from 

 2-3 to 8 feet thick. 2. Mines of Goloubovka, Orekhovo, and Petro 

 Marievka ; the first contains 10 seams, 3 to 4J feet thick ; the second 

 21 seams of coal and 2 of iron ; the third 10 seams (only 3 worked). 

 3. Anthracite Coals of Grouchevka and Pastoukhow. 4. Various mines 

 yielding coal and iron-ore. , G. A. L. 



Issel, Prof. Arturo. [Ophiolite.] Atti R. Ac. Sci. Torino, vol. x. 

 pp. 765-769. [See Gastaldi, p. 388.] 



Jernegan, Joseph L. The Whale Lode of Park County, Colorado 

 Territory. Trans. Amer. Inst. Min. Eng. vol. iii. pp. 352-356. 



The geological history of this lode is as follows : — 1. Formation of 

 the fissure in the country-rock by plutonic agency, accompanied perhaps 

 by lateral movement of one or both of the fissure-walls. 2. Deposition 

 from solution of minerals now composing the vein-material on the sides 

 of the fissure. A third stage might perhaps be added, viz. the impreg- 

 nation of the country-rock from the vein outwards with iron-pyrites. 

 The frequent occurrence of barite in this lode is noted. E. B. N. 



Johnson, Jasper. The Wilmington, Illinois, Coal Peld. Trans. 

 Amer. Inst. Min. Eng. vol. iii. pp. 188-202. 



Notes the discovery of this coal-field, and describes the geological 

 features of the neighbourhood. Average analyses of 4 samples of the 

 coal are given ; also sections of several shafts, and of a well. E. B. N. 



Johnston, R. M. The Launceston Tertiary Basin. Second Paper. 

 Monthly Notices B. Soc. Tasm. for 1874. Pp. 53-62 ; 1 plate 

 (fossil plants). 

 Correlates the Launceston Beds (3 zones) with those of Table Cape, 

 which are regarded as homotaxial with the European Eocene. 



