i^96 ADDENDA. 



are given, the various collieries and workings being described separately. 

 A tabular statement of the coal worked up to 1874, and another with 

 analyses and dip of the chief coals, are given. G. A. L. 



Sails, Friedr. von. Notanden iiber erratischer Erscheinungen im 

 Rheingebiet (Quaternare Bildungen). [Erratics in Rhine Basin 

 (Quaternary).] Jahrh. Schweiz. Al^enclub^ Jahrg. x. pp. 457-464. 



Salwey, T. J. The Geology, History, and Natural Features of the 

 Neighbourhood; an address given at the Haye Park Meeting. 

 Trans. Woolhope Field Club, 1872, pp. 83-88. 



Samuelsou, N. [Analysis of dried brick-clay used in Sheffield as a 

 flux for welding cast steel.] Minincf Worlds vol. viii. p. 591. 



In a paper " On Welding Iron," by Mr. Howson. 



Schmidt, Adolf. On the Eorms and Origin of the Lead and Zinc 



Deposits of South-west Missouri. Trans. Acad. Sci. St. Louis, 



vol. iii. no. 2, pp. 246-252. 



These deposits occur mostly in the Keokuk group (L. Carboniferous). 



Five kinds are recognized : — 1. Runs ; 2. Openings ; 3. Impregnations 



of fissured chert beds ; 4. Irregular deposits in loose accumulations of 



broken chert ; 5. Seams and impregnations in quartzite. Each kind 



is described, and the origin of the ores is discussed. E. W. R. 



Schmidt, Prof. Carl. [Analysis of Gas from the Elbruzzo.] Sitz. 

 nat. Ges. Dorpat, Bd. iii. App., pp. xxiii, xxiv. 



Simpson, John Bell. On the Coal-fields and Mining Industries of 

 Russia. Tracts. N. Engl. Inst. Eng. vol. xxiv. pp. 3-18, pis. i.-vii. 

 (maps and sections). 

 Describes the Moscow, Donetz, Ural, and Polish coal-fields, giving 

 statistics of production of coal and other Russian minerals. 



Skalkovski, C [Mining Products in Russia,] Gornoi Journ. vol. iii. 



(?iv.) pp. 195-245. Also published separately in French as 



" Tableau statistique de I'lndustrie des Mines en Russie." St. 



Petersburg. 



Spencer, J.W. Geological Sketches of the neighbourhood of Hamilton. 



Canad. Nat. n. s. vol. vii. p. 463-471. 

 Describes the Medina, Clinton, and Niagara formations. The Dundas 

 Valley was first formed by a river flowing from the W., then partly 

 filled, during subsidence, by Erie Clay, and finally re-excavated ; the old 

 shore-lines consist of debris of the Hudson River and Niagara rocks. 

 The minerals and mineral waters are referred to. R. B. N. 



Spezia, G. Nota sul Berillo del Protogino del Monte Bianco. 

 [Beryls in the, Mt. Blanc protogine.] Atti E. Ac. Sci. Torino, 

 vol. xi. pp. 82-87. 

 Strnve, H. Untersuchung einer neuentdecken Steinkohle bei Gelazk 

 in Imeretien. [Analysis of a newly discovered Coal in Imeretia 

 (Asia Minor).] Bull. Ac. Imp. Sci. St. Petersb. t. xxi. pp. 71-74. 

 Analysis by Rudnew. 



