BIBIJOGRAPHY OF N. H. WINCHELL 35 



Ciirular letter to the geologists of America (as chairman of a com- 

 mittee for the organization of what became the Geological Societj- 

 of America). 1S81. Eepriiited in Am. Geol., vol. vi, pp. 184-185. 

 1890. 



The State and higher education. Bull. Minn. Acad. Sci., vol. ii, pp. 1-18. 

 1881. 



Typical thin sections of the Cupriferous series in Minnesota. I'roc. 

 Am. Assoc. Adv. Sci., vol. xxx, pp. 160-166. 1881. 



1882. The tenth annual report of the Geological and Natural History Survey 



of Minnesota for 1881. 254 pp. 8vo. St. Paul, 1882. This report 

 contains : 



Preliminary list of rocks (field descriptions and notes on 39.3 



rock samples from northern Minnesota), pp. 9-122. 

 The Potsdam sandstone, pp. 123-130. 

 Typical thin sections of the rocks of the Cupi'iferous series in 



Minnesota, pp. 137-143. 

 Geological notes on Minnesota (translation of "Geologische Noti- 

 zen aus Minnesota," by .J. H. Kloos. Zt. d. d. geol. Gesell., vol. 

 xxiii, pp. 417-448; 648-6.52. with map, 1871), pp. 175-200. 

 The geology of the deep well drilled by G. C. Whelpley at Min- 

 neapolis, at the "C" Washburn mill, pp. 211-217. 

 Resume d'une communication sur la nomenclature geologique dans 

 I'echelle stratigraphique. Congres geol. internat. C. R., 2d session, 

 pp. 642-646. 1882. 

 Report of the section of mineralogy. Bull. Minn. Acad. Sci., vol. ii, pp. 



390-416. 1882. 

 Geology of the Minnesota Valley. History of the Minnesota Valley, pp. 

 169-176 (700-707). 1882. 



1883. The eleventh annual report of the Geological and Natural History Sur- 



vey of Minnesota for 1882. 220 pp. Svo. Minneapolis, 1883. This 

 report contains : 



The mineralogy of Minnesota, pp. 5-29. 



The crystalline rocks of Minnesota (translation of "Uebor die 

 krystallinischen Gesteine von Minnesota in Nord-Amerika," by 

 A. Streng and J. H. Kloos. Neues Jahrb., 1877, pp. 31-56, 113- 

 138, 225-242), pp. 30-85. 

 Note on the age of the rocks of the Mesabi and A'ermilion iron 

 districts, pp. 168-170. 

 Resolutions on the death of Darwin. Bull. Minn. Acad. Sci., vol. ii, pp. 



386-387. 1883. 

 The Lake Superior rocks. Science, vol. i, p. 334. 1883. 

 Clay pebbles from I'rinceton, Minn. Proc. Am. Assoc. Adv. Sci., vol. 

 xxxii, p. 238. 18&3. 



1884. The twelfth annual report of the Geological and Natiir.il History Sui- 



vey of Minnesota for 1883. 410 pp. 8vo ; 23 plates. Minneapolis. 

 1884. This report contains : 



The comparative strength of Minnesota and New England gran- 

 ites, pp. 14-18. Also in ab-stract in I'roc. \m. Assoc. Adv. Sci., 

 vol. xxxii, pp. 249-250. 1884. 



