BIBLIOGRAPHY OF N. H. WINCHELL 41 



1895. The twenty-third annual report of the Geological and Natural History 

 Survey of Minnesota for 1894. 255 pp. 8vo ; 3 plates. Minneapolis, 

 1895. This report contains : 



The origin of the Archean greenstones, pp. 4-35. 

 The progress of mining, pp. 215-217. 

 List of rock samples, pp. 238-240. 

 The Geology of Minnesota ; final report of the Geological and Natural 

 History Survey of Minnesota, volume iii, part 1. 474 and Ixxv pp. 

 4to; 42 plates and 34 figures. Minneapolis, 1895. This report con- 

 tains : 



Historical sketch of investigation of the Lovper Silurian in the 



Upper Mississippi Valley (with E. O. Ulrich), pp. ix-liii. 

 Note on other Cretaceous fossils in Minnesota, pp. 53-55. 

 Sponges, graptolites, and corals from the Lower Silurian in Min- 

 nesota (with Charles Schuchert), pp. 55-59. 

 The Lower Silurian brachiopoda of Minnesota (with Charles 

 Schuchert), pp. 33.3-374. 

 The age of the Galena limestone. Am. Geol.. vol. xv, pp. .33-39. 1895. 

 The source of the Mississippi. Am. Geol., vol. xvi, pp. 323-326. 1895. 



See also Minn. Hist. Soc. Coll., vol. viii, part 2, pp. 226-231. 1896. 

 The feldspars. Am. Geol.. vol. xvi, pp. 51-58. 1805. 

 Crucial points in the geology of the Lake Superior region. A .series of 

 ten articles, as follows : 



The stratigraphic base of the Taconic or I^ower Cambrian. Am. 



Geol., vol. XV, pp. 153-162. 1895. 

 The paleontologic base of the Taconic or Lower Cambrian. Am. 



Geol., vol. XV, pp. 229-234. 1895. 

 The eruptive epochs of the Taconic or Lower Cambrian. Am. 



Geol., vol. XV, pp. 295-304. 1895. 

 Canadian localities of the Taconic eruptives. Am. Geol., vol. xv, 



pp. 356-363. 1895. 

 Steps of progressive research in the geology of the Lake Su- 

 perior region prior to the late Wisconsin Survey. Am. Geol., 

 vol. xvi, pp. 12-20. 1895. 

 The Keweenawan according to the Wisconsin geologists. Am. 



Geol., vol. xvi, pp. 75-86. 1895. 

 A rational review of the Keweenawan. Am. Geol.. vol. xvi, pp. 



150-162. 1895. 

 The synchronism of the Lake Superior region with other por- 

 tions of the Nortii American continent. Am. Geo!., vol. xvi, 

 pp. 205-213. 1895. 

 The latest eruptives of the Lake Superior region. Am. Geol., 



vol. xvi, pp. 269-274. 1895. 

 Comparative taxonomy of the rocks of the Lake Superior region. 

 Am. Geo!., vol. xvi, pp. 331-337. 1895. 

 189G. Sur la met6orite tomb^e le 9 Aout, 1894, pr(^s do Fisher, Minnesota. 

 C. R., Acad. Sci., vol. cxxii, pp. 681-682. 1896. 

 Sur un cristal de labrador (l\i gabbio de Minnesota, r.iill. S<i<-. Miii. 

 France, vol. xix, pp. 90-92. 1896. 



IV — Bull. Geol. Soc. Am., Vol. UG, 1014 



