BIBLIOGRAPHY, MAINLY OF GEOLOGY AND COLLATERAL 



SUBJECTS 



On the relative positions of the forest bed and associated drift formations 

 in northeastern Iowa. Am. Jour. Sci., 3d ser., vol. 15, 1878, pp. 339-341. 



On the artificial mounds of northeastern Iowa, and the evidence of the 

 employment of a unit of measurement in their erection. Am. Jour. Sci., 

 3d ser., vol. 16, 1878, pp. 272-278. 



On the complete series of superficial formations in northeastern Iowa. 

 Am. Assoc. Adv. Sci., Proc., vol. 27, 1879, pp. 198-231. 



Notes on the surface geology of a part of the Mississippi Valley. Geol. 

 Mag., n. s., vol. 6, 1879, pp. 353-361; 412-420. 



Superposition of glacial drift upon residuary clays [Iowa]. Am. Jour. 

 Sci., 3d ser., vol 18, 1879, pp. 301-303. 



On some Iowa kames and aasar. Iowa Acad. Sci., Proc., vol. 1, pt. 1, 

 1875-1880, p. 15. 



The "laterite" of the Indian Peninsula. Geol. Mag., n. s., vol. 7, 

 1880, pp. 310-313. 



A contribution to Dr. CrolTs theory of secular change in terrestrial cli- 

 mate. Iowa Acad. Sci., Proc., vol. 1, pt. 1, 1875-1880, p. 24. 



Additional observations on Iowa kames and aasar. Iowa Acad. Sci., 

 Proc., vol. 1, pt. 1, 1875-1880, p. 25. 



On maximum synchronous glaciation. Am. Assoc. Adv. Sci., Proc., vol. 

 29, 1881, pp. 447-509. Abstracts: Science, vol. 2, 1881, pp. 566-567; 

 Am. Jour. Sci., 3d ser., vol. 22, 1881, pp. 264-267; 368-369. 



A contribution to Croll's theory of secular climatic changes. Am. Jour. 

 Sci., vol. 22, 1881, pp. 437-443; Amer. Assoc. Adv. Sci., Proc., vol. 2, 1881, 

 pp. 175, 176. 



On some elements in orthographic displacement. Am. Jour. Sci., 3d 

 ser., vol. 21, 1881, pp. 276-278. 



The geology of Iowa soils. Iowa State Horticultural Soc., Trans., vol. 

 15, 1881, pp. 101-105. 



Shale and Davis' "Glaciers." Science, vol. 2, 1881, pp. 581-584; 624- 

 630. 



On local subsidence produced by an ice-sheet. Am. Jour. Sci., 3d ser., 

 vol. 22, 1881, pp. 368, 369. 



Modifications proposees dans la nomenclature geologique. Int. Cong. 

 Geol., Compte Rendu, 2d ser., 1882, pp. 620-622. 



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