ACKNO WLEDGMENTS. 



The following papers have been donated to the library of th5 Geological Depart- 

 ment of the University of Chicago, mainly by their authors: 



Merrill, George P. 



—The Collection of Building and Ornamental Stones in the U. S. Nat. Mus- 

 eum. A Handbook and Catalogue. 372 pp. (277-648), 9 pi., 111. Report Smith- 

 sonian Inst., 1885-6. Part II., 1889. 



— On a Peridotite from Little Deer Isle, in Penobscot Bay, Maine. 5 pp. (191- 

 195), I pi. Proc. U. S. Nat. Mus., 1888. 



— On Fulgurites. 9 pp. (83-91), i pi. —Proc. U. S. Nat. Mus., 1886. 



— Fulgurites or Lightning Holes. 11 pp. (529-539). 111. — Pop. Sci. Monthly, 

 Feb., 1887. 



— Preliminary Handbook of the Department of Geology in the U. S. Nat. Mus- 

 eum. 50 pp.— Rep. U. S. Nat. Mus., 1888-89. iSqi- 



— On Deposits of Volcanic Dust and Sand in Southwestern Nebraska. 2 pp. 

 (99-100). — Proc. U. S. Nat. Mus., Apr., 1885. 



— Secondary Enlargement in a Peridotite from Little Deer Isle, Maine. 3 pp. 

 111. (488-490).— Am. Jour. Sci., June, 1888. 



— On the Serpentine of Montville, New Jersey. 8 pp. (105-112), 2 pi. — Proc. 

 U. S. Nat. Mus., 1888. 



— On the San Emigdio Meteorite. 7 pp. (161-167.) 111. — Proc. U. S. Nat. 

 Mus., 1888. 



— On the Ophiolite of Thurman, Warren Co., N. Y., with remarks on the Eo- 

 zoon Canadense. 3 pp. (189-191). — Am. Jour. Sci., Vol. XXXVII, Mch., 1889. 



— On the Collection of Maine Building Stones in the U. S. National Museum. 

 19 pp. (165-183).— Proc. U. S. Nat. Mus., Vol. VI, No. 12, Oct., 1883. 



— Notes on the Serpent'inous Rocks of Essex Co., N. Y., from Aqueduct Shaft 

 26, New York City, and from near Easton, Pennsylvania. 6 pp. (595-600). — 

 Proc. U. S. Nat. Mus., Vol. XII, No. 383, 1890. 



— Handbook for the Department of Geology in the U. S. National Museum. 

 Part I, Geognosy — The materials of the earth's crust. 89 pp. (503-591), 11 pi. — 

 Rep. U. S. Nat. Mus. for 1890. 



— On some Basic Eruptive Rocks in the vicinity of Lewiston and Auburn, An- 

 droscoggin Co., Maine, with analysis by R. L. Packard. 7 pp. (49-55). 111. — 

 Am. Geol., Vol. V, July, 1892. 



— On the Black Nodules or so-called Inclusions in the Maine Granites. 5 pp 

 (137-141).— Proc. U. S. Nat. Mus., Feb., 1883. 



— On the Mineralogical Composition of the Normal Mesozoic Diabase upon the 

 Atlantic Border. By George W. Hawes, Ph.D. 6 pp. (129-134). — Proc. U. S 

 Nat. Mus., June, 1881. 



— On the determination of Feldspar in Thin Sections of Rock. By George W 

 Hawes, Ph.D. 3 pp. (134-136).— Proc. U. S, Nat. Mus., Apr., 1881. " 



— On Prochlorite from the District of Columbia. I p. — Proc. U. S. Nat. Mus. 

 Apr., 1884. 



— On Hornblende Andesites from the New Volcano on Bogosloff Island ir 

 Bering Sea. 3 pp. (31-33).— Proc. U. S. Nat. Mus., Vol. VIII, No. 3, April 

 1885. 



— An Account of the Progress of Petrography for the years 1887, 1888. 28 pp 

 (327-354). — Smithsonian Rep., 1888, 1890. 



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