32 



PROCEEDINGS OF THE PHILADELPHIA MEETING 



1870. The Thunder Bay region. Detroit Free Press. April 11, 1870. 

 A sunken hil^e and its outlet. Detroit Tribune. 1870. 



Phenomena of the post-Tertiary. University Chronicle, Ann Arbor. 



August, 1870. 

 Geological notes in the Thunder Bay region. Alpena Pioneer (six 



papers). Oct.-Dec, 1870. 



1871. The building stones of Michigan. American Builder (three papers). 



June, 1871. 



The geology of Putnam County, Ohio. Putnam County Sentinel. Oct. 

 1871. 



Sketch of Crawford County, Ohio. 1871. 



The glacial features of Green Bay of Lake Michigan, with some obser- 

 vations on a probable former outlet of Lake Superior. Am. Jour. 

 Sci., 3d ser, vol. ii, pp. 15-19. July, 1871. 



1872. Sketch of Delaware County, Ohio. Delaware Gazette. July 8, 1872. 

 The surface geology of northwestern Ohio. Proc. Am. As.soc. Adv. Sci., 



vol. xxi, pp. 152-186. 1872. Abstract in Am. Jour. Sci., vol. iv, pp. 

 321-322. 1872. 



1873. The first annual report of the Geological and Natural History Survey 



of Minnesota, 1872. First and second editions identical, 112 pp. 8vo. 

 This report contains : 



General sketch of the geology of Minnesota, pp. 40-48, 60-118. 

 Preliminary geologic map of Minnesota. 



Chart of geologic nomenclature, intended to express the relation 

 of Minnesota to the great geological series of the earth. 

 The drift-deposits of the Northwest. Popular Science Monthly. June 



and July, 1873, vol. ill, pp. 202-210, 286-297. 

 Notes on the drift-soils of Minnesota. Fourth annual report of the 



commissioner of statistics of Minnesota, 1873. 

 The Devonian limestones in Ohio. Proc. Am. Assoc. Adv. Sci., vol. xxii, 



pp. 100-104. 1873. 

 The geology of Sandusky, Seneca, Wyandot, and Marion counties, Ohio. 

 Kept. Geol. Surv. Ohio, vol. i. pp. 591-645; 4 maps. Columbus, 1873. 



1874. The geology of Ottawa, Crawford, Morrow, Delaware, Van Wert, Union. 



Paulding, Hardin, Hancock, Wood, Putnam, Allen, Auglaize, Mercer, 

 Henry, and Defiance counties, Ohio. Kept. Geol. Surv. Ohio, vol. ii, 

 pp. 227-438. Columbus, 1874. 

 The second annual report of the Geological and Natural History Survey 

 of Minnesota, 1873. 219 pp. Svo. St. Paul, 1874. This report con- 

 tains : 



The Belle Plaine salt well, pp. 79-87. 

 Peat, pp. 88-127. 



The geology of the Minnesota Valley, pp. 127-212. 

 On the Hamilton in Ohio. Am. Jour. Sci., 3d ser., vol. vii. pp. 395-398. 



1874. 

 Report concerning the salt spring lands due the State of INIinnesota, 



1874. 26 pp. 8vo. 

 Geological notes from early explorers in the Minnesota Valley. Bull. 

 Minn. Acad. Sci., vol. i, pp. 89-101, 153-156. 1874. 



