870 JOURNAL OF GEOLOGY. 



— On the Hornblende of St. Laurence County, N. Y., and its Gliding Planes. 

 352-358 pp. — Am. Jour. Sci., Vol. XXXIX, May, 1S90. 



— Note on Some Remarkable Crystals of Pyroxene from Orange County, N. V. 

 275-276.— Am. Jour. Sci., Vol. XXXIV., Oct. 1887. 



— Celestite from Mineral County, West Virginia. 183-187 pp. — Am. Jour. 

 Sci., Vol. XXXIX, March, 1890. 



— Colestin von Mineral County, West Virginia. 6 pp. — Zeit. fur Krystallo- 

 graphie, etc., XVIII. Leipzig, Wilhelm Engelmann, 1890. 



— Cause of the apparently Perfect Cleavage in American Sphene (Titanite). 

 486-490 pp. — Am. Jour. Sci., Vol. XIX, June, 1885. 



— Anglesite, Cerussite and Sulphur from the Mountain View Lead Mine, near- 

 Union Bridge, Carroll County, Md. 6 pp. — Johns Hopkins Univ. Cir., No. 87. 



— On a Remarkable Crystal of Pyrite from Baltimore County, Md. — Johns 

 Hopkins Univ. Cir., No. 52, 1886. 



— Syllabus of Lectures on Optical Crystallography. 6 pp. 



— Note on Crystals of Metallic Cadmium. 273-276 pp. — Am. Chem. Jour., 

 Vol. XIV, No. 4. 



— On the Crystal Form of Metallic Zinc. 8 pp., 2 pi. — Am. Chem. Jour., Vol. 

 II, No. 4. 



— Contributions to the Mineralogy of Maryland. 9 pp. — Johns Hopkins Univ. 

 Cir. No. 75. 



— On the Possibility of Hemihedrism in the Monoclinic Crystal System, with 

 especial reference to the Hemihedrism of Pyroxene. 1 15-120 pp., 111. — Am. 

 Jour. Sci., Vol. XXXVIII, Aug. 1889. 



— Note on Quartz-Bearing Gabbro in Maryland (by Ulysses Sherman Grant). 

 4 pp. — Johns Hopkins Univ. Cir. No. 103. 



— On a Petrographical Microscope of American Manufacture. 11 4-1 17 pp. 

 —Am. Jour. Sci., Vol. XXXV, Feb. 1888. 



— A New Machine for Cutting and Grinding thin Sections of Rocks and 

 Minerals. 102-104 pp. — Am. Jour. Sci., Vol. XLV, Feb. 1893. 



— The Volcanic Rocks of South Mountain in Pennsylvania and Maryland. 

 482-496 pp., 1 map, 1 pi. — Am. Jour. Sci., Vol. XLIV, Dec. 1892. 



— Some Modern Aspects of Geology. 640-648 pp. — Pop. Sci. Monthly, Sept. 

 1889. 



— The Geology of Washington and Vicinity iby W J McGee). 38-64 pp. — 

 Int. Cong, of GeoL, fifth session, 1891. 



— On the Use of the Terms Poikihtic and Micropoikilitic in Petrography. 176— 

 179 pp. — Jour, of GeoL, Vol. I, No. 2, Feb.-March, 1S93. 



— Die Eruptivgesteine der Gegend von Triberg im Schwarzwald. 54 pp., 2 pi. 



— Baltimore American Institute of Mining Engineers. 139 pp., 3 maps. — Am. 

 Inst. Min. Eng., Baltimore Meeting, Feb. 1892. 



— Contributions to the Geology of the Cortlandt Series, near Peekskill, N. Y. 

 259-269 pp., 111. — Am. Jour. Sci., Vol. XXVIII, Oct. 1884. 



— A Summary of Progress in Mineralogy and Petrography in 1885. 296- 

 1216 pp. — Am. Nat., 1866. 



— On a New Plan proposed for future work upon the Geological map of the 

 Baltimore Region. — Abstr. from Bait. Nat. Club, May 18, 1887. 



