BIBLIOGRAPHY OP N. H, WINCHELL 43 



The oldest known rock. Abstract. Proc. Am. Assoc. Adv. Sci., vol. 



xlvii, pp. 302-303; Science, vol. viii, p. 504. Am. Geol., vol. xxii, pp. 



262-263. 1898. 

 Note on the characters of mesolite from Minnesota. Am. Geol., vol. 



xxii, pp. 228-230. 1898. 

 The origin of the Archean igneous rocks. Am. Geol., vol. xxii, pp. 200- 



310. 1898. 

 Thomsonite and lintonite from the north shore of Lalce Superior. Am. 



Geol., vol. xxii, pp. 347-349. 189S. 



1899. The twenty-fourth annual report of the Geological and Natural History 



Survey of Minnesota for 1895-1898. 284 + xxviii pp. 8vo. Minne- 

 apolis, 1898. This report contains : 



Summary statement (of work, museum, library, cost, and results 



of the Survey), pp. vii-xxviii. 

 Rock samples collected in 1896-1898 (with geological notes), pp. 



1-84. 

 General index of the annual reports of the Minnesota Survey 

 [reports i-xxiv], pp. 179-284. 

 The (Jeology of Minnesota; final report of the Geological and Natural 

 History Survey of Minnesota, volume iv. 630 pp. 4to; 79 plates and 

 114 figures. St. Paul, 1899. This report contains : 



Preface (discussion of classification of .\rchean), pp. xiii-xx. 

 Geology of Carlton County, pp. 1-24. 

 Geology of St. Louis County, pp. 212-265. 

 Geology of Lake County, pp. 266-312. 

 Geology of (parts of) the Mesabi iron range, pp. 358-398. 

 Geology of the Pigeon Point plate, pp. 502-521. 

 Geology of the Vei-milion Lake plate, pp. 522-549. 

 Geology of the Carlton plate, pp. 550-565. 

 Geology of the Duluth plate, pp. 566-580. 

 Thalite and bowlingite fi-om the north shore of Lake Superior. Am. 



Geol., vol. xxiii, pp. 41-44. 1899. 

 Chlorastrolite and zonochlorite from Isle Royale. Am. Geol., vol. xxiii, 



pp. 116-118. 1899. 

 Common zeolites from the Minnesota .shore of Lake Superior. .\m. 



Geol., vol. xxiii, pp. 17(J-177. 1899. 

 The optical characters of jacksonite. Am. Geol., vol. xxiii, pp. 250-251. 



1899. 

 Adularia and other secondary minerals from the copper-bearing rocks. 



Am. Geol., vol. xxiii, pp. 317-318. 1899. 

 rH)ewinson-Lessing's classification of rocks .-iihI differentiation of mag- 

 mas. Am. Geol., vol. xxiii, pp. .346-.369. IS!)!). 



1900. The Geology of Minnesota; final report of the (Jeological and Natural 



History Survey of Minnesota, volume \. 1027 and xxvii pp. 4to; 6 

 plates and 55 figures. St. Paul, 1900. This report contains: 



I'refaco (classification of Taconic and Archean), pp. xxiii-xxvii. 



Structni'al geology, ]ip. 1-74. 



Petrographic geology of l]i(< crystalline rocks of .Miniiesol.i (wilb 

 Tl. S. (Jrant), p]h 75-9.36. 



Mineralogy and petrology of Miiuiesota, pjt. 957-999. 



