38 PROCEEDINGS OF THE I'HILADELPHIA MEETING 



The so-called Huronian rocks in the vicinity of Sudbury, Ontario. Bull. 



Minn. Acad. Sci., vol. iii, pp. 183-185. 1889. 

 American petrographical microscopes. Am. Geol., vol. iii. pp. 225-230. 



1889. 



Unconformity at the falls of the Montmorenci. Am. Geol., vol. iii, pp. 



333-334. 1889. 

 Sandy simoon in the Northwest. Am. Geol., vol. iii, pp. 397-399. 1889. 

 Benjamin Franklin Shumard, a sketch. Am. Geol., vol. Iv, pp. 1-6. 



1889. 

 On a possible chemical origin of the iron ores of the Keewatin in Min- 

 nesota (with H. V. Winchell). Am. Geol., vol iv, pp. 291-300, 383- 



386. 1889. Proc. Am. Assoc. Adv. Sci., vol. xxxviii, pp. 235-242. 1889. 

 Methods of stratigraphy in studying the Huronian. Am. Geol., vol. iv, 



pp. 342-357. 1889. 

 Notice of the discovery of Lingula and Paradoxides in the red quartz- 



ites of Minnesota. Bull. Minn. Acad. Sci., vol. iii, pp. 103-105. 1889. 

 Professor Irving and the Keewatin series and the origin and horizon of 



the iron ores of the Vermilion Lake series (with H. V. Winchell). 



Am. Geol., vol. iv. pp. 383-386. 1889. 

 1S!K). The eighteenth annual report of the Geological and Natural History 



Sui'vey of Minnesota for 1889. 234 pp. 8vo. St. Paul, 189U. This 



report contains : 



Record of field observations in 1888 and 1889 (studies of crystal- 

 line rocks of northeastern Minnesota), pp. 7-63. 

 The Brenham, Kiowa County, Kansas, meteorites (with J. A. Dodge). 



Am. Geol.. vol. v, pp. 309-312 ; vol. vi, pp. 370-377. 1890. 

 A sketch of Richard Owen. Am. Geol., vol. vi, pp. 135-145. 1890. 

 The pre-natal history of the Geological Society of America. Am. Geol., 



vol. vi, pp. 181-194. 1890. 

 The Ta conic iron ores of Minnesota and western New England (with 



H. y. Winchell). Am. Geol., vol. vi, pp. 263-274. 1890. 

 Quebec not in conflict with Taconic. Am. Geol., vol. vi, pp. 310-311. 



1890. 

 What constitutes the Taconic Mountains? Proc. Am. Assoc. Adv. Sci., 



vol. xxxix, pp. 246-247. 1890. Also Am. Geol., vol. vi. p. 247. 1890. 

 The eastern equivalents of the Minnesota iron ores. Read before Minn. 



Acad. Sci., Oct. 7, 1890. Pul dished in Iron Ores of Minnesota, pp. 



411-419. 

 Northern Pacific Railroad. Macfarlane's Geol. Railway Guide, 2d ed., 



pp. 258-259. 1890. 

 1891. The iron ores of INIinnesota ; their discovery, development, geology, 



origin, and comparison with those of other mining districts (with 



H. V. Winchell). 430 pp. 8vo ; 41 plates and three maps. Bull. 6, 



Geol. Nat. Hist. Surv. Minn. Minneapolis, 1891. 

 Museums and their purposes. A lecture, May, 1891 ; published in No. 1 



of St. Paul Academy of Science. 1891. . 

 A letter to the Minnesota Horticultural Society, describing certain 



maps of tlie Stale <>f Miiuiesota. Rept. Minn. Hort. Soc, is;)], pj). 



296-299. 



