Notices respecting New Books. 321 



Part V., by Mr. E. T. Sweet, gives the topography, natural- 

 history, geology, lithology, and economics of the "Western Lake- 

 Superior District " of the State. Among the Quaternary deposits 

 occur the Moraines and Pot-holes of the Kettle Range, similar to 

 that of Eastern Wisconsin, described in the previous volume. In 

 the Glacial Drift occur not unfrequently nuggets and boulders of 

 native copper. Some of the granitic and gneissic boulders must 

 have crossed Lake Superior and travelled at least 200 miles. 



Part VI. consists of an account of the " Geology of the Upper 

 Saint-Croix District," based on the Notes of the late Mr. Moses 

 Strong, edited by Mr. C. T. Chamberlin. It treats of the Surface- 

 features, the Quaternary formations, and the Older formations, both 

 generally and in detail. This area is inland and south of the 

 " Western Lake-Superior District." 



The Menominee Region, including parts of both Wisconsin and 

 Michigan, is described geologically and lithologically in Parts VII. 

 and VIII. by Major Thomas Benton Brooks and Mr. E. T. Street. 

 This being an important iron-district, overrunniug the boundary 

 of the two contiguous States, and Wisconsin not supplying any 

 money for the Survey beyond its own border, Major Brooks com- 

 pleted the work at his own expense, and suffered serious illness also 

 from his labours. Besides the Superficial Deposits of Drift &c, the 

 country has: — 1. The Calciferous sand-rock and limestone and 

 the Saint-Mary's (Potsdam) sandstone, of the Lower Silurian; 

 2. None of the Copper-series ; 3. The Upper-Huronian granite, 

 gneiss, schists (hornblende, actinolite, mica, chlorite, and quartz), 

 iron-ores, clay-slate, carbonaceous slate or graphitic shale, quartzite, 

 and conglomerate. 4. Middle-Huronian clay-slate and quartzite. 

 5. Lower-Huronian dolomite, iron-ore, and quartzite. 6. Lauren - 

 tian granite, gneiss, and crystalline schists. Three elaborate Tables 

 of the rocks and their component minerals in the Menominee 

 and Marquette Regions present a summary of the lithological 

 characters of the several systems and series of rocks and of their 

 relative abundance and stratigraphical order. The descriptive 

 lithology of the Menominee rocks and of the Huronian rocks 

 south of Lake Superior form two interesting chapters (Chapters 3 

 and 4) of Part VII. ; and are followed by Dr. Arthur Wichmann's 

 microscopical investigations in the Huronian rocks, prefaced with 

 a technical account of the minerals composing the said rooks. 

 Besides this eminent lithologist of Leipsic, others have aided in 

 the microscopical lithology of Wisconsin as treated in this volume, 

 namely E. Tornebohm, E. Zirkel, Herr Wapler, S. Allport, Erank 

 Rutley, G. J. Brush, J. D. Dana, G. W. BZawes, A. A. Julien, 

 T. Sterry Hunt, Prof. R. Pumpelly, T. B. Brooks, and C. E. Wright, 

 Nine coloured plates of microscopic sections of rocks occur in the 

 volume, and enhance the value of the lithological descriptions. The 

 lithographic and chromolithographic views, maps, and sections, 

 illustrating the topography, geology, and mining, are numerous (44) ; 

 there are also 23 woodcuts, chiefly sections of strata. Above all, 

 the magnficent Atlas of Plates XVII. to XXX. inclusive, giving 

 Phil Mag. S. 5. Vol. 14. No. 88. Oct. 1882. Y 



