74 BIBLIOGRAPHY AND INDEX OF N. A. GEOLOGY, [bull. 135. 
424 Newell (Frederick H.) Eesults of stream measurements. 
U. S. Geol. Surv., 14th Ann. Rept., pt. 2, pp. 95-155, figs. 6-24. 
Describes the character and methods of obtaining the data and gives 
the results obtained in different streams in the Western States. 
424r/ New Jersey, Geological Survey. Annual Report, 1892. 
Abstract : Am. Nat., vol. xxviii, pp. 336-337 (}p.). 
424fr Niles (William H.). A geological study of Lake Mohonk and 
Lake Minnewaska, New York. 
Abstract: Am. Geol., vol. xiii, p. 211 (7 1.). 
425 Norton (William Harmon). Notes on the lower strata of the 
Devonian series in Iowa. 
Iowa Acad. Sci., Proc, vol. i, pt. iv, pp. 22-24. 
Divides the series mentioned into four stages, and describes the 
l'thologic character of the beds and mentions some of the contained 
fossils. 
42G Orton (Edward). Geological scale and geological structure of 
Okie. 
Ohio Geol. Surv., vol. vii, pp. 3-44. 
Gives a vertical section of the geologic formations of Ohio and 
describes their character and distribution. 
427 The clays of Ohio, their origin, composition, and varieties. 
Ohio Geol. Surv., vol. vii, pp. 45-68. 
Describes the origin of clay beds and their geologic distribution. 
428 The coal fields of Ohio. 
Ohio Geol. Surv., vol. vii, pp. 253-290. 
Discusses the origin of coal and describes the various coal seams of 
the Carboniferous strata in Ohio. 
420 Geological surveys of Ohio. 
Jour, of Geol., vol. ii, pp. 502-516. 
Gives a historical sketch of the geological surveys of Ohio. 
430 From the Ohio Kiver to Chicago. Itinerary. 
Int. Cong. Geol., Compte Rendu, 5th session, pp. 291-298. 
Describes the region traversed by the Western excursion, with spe- 
cial reference to the gas wells. 
431 Orton (Edward, jr.). The clay-working industries of Ohio. 
Ohio Geol. Surv., vol. vii, pp. 69-254. 
Describes the origin, chemical compositiou, and physical properties 
of clay, and gives an account of the clay-working industries. 
431a Osann (A.). Eleolite rocks of Trans-Pecos, Texas. 
Abstract: Am. Nat., vol. xxviii, pp. 514-515. 
Noticed in Bibliography and Index for 1892 and 1893. 
431/> Nepheline-mellilite rocks of Texas. 
Abstract: Am. Nat., vol. xxviii, pp. 799-800 (l ; p.). 
Noticed in Bibliography and Index for 1892 and 1893. 
