--Note on the New Geological Map of Europe. 6 pp.--Trans. Am. Inst. Min. Engin. --Some Supposed Fossils from the Susquehanna River, just South of the Pennsylvania-Maryland Line. 3 pp., 1 pl.--Proc. Am. Phil. Soc'y XVIII, Sept. 18, 1879. --Missing Ores of Iron. 12 pp., Ill.--Trans. Am. Inst. Min. Engin., Vol. VI, 1879. --The Peach Bottom Slates of Southeastern York and Southern Lancaster Counties, Penn. 5 pp., 1. pl.--Trans. Am. Inst. Mining Engin., 1883. --A Speculation on Protoplasm. 7 pp.--Am Nat., July, 1876. --A Mirror for Illuminating Opaque Objects for the Projecting Microscope. 2 pp.--Am. Phil. Soc'y, Feb. 20, 1880. --The Progress of Chemical Theory; Its Helps and Hindrances. 37 pp.--Journ. Franklin Instit., Apr., May and June, 1891. --Mineral Formulæ. 6 pp.--Proc. Acad. Nat. Sci., Phila., July 7, 1874. --Notes from the Literature on the Geology of Egypt, and Examination of the Syenitic Granite of the Obelisk which Lieut. Comd'r Gorringe, U. S. N., brought to New York. 27 pp., 4 pl.--Trans. Am. Inst. Mining Engin., 1883. --Report of Committee on the International Congress of Geologists. 3 pp.--Proc. A. A. A. S., Vol. XXXIX, 1890. --On Certain Trap Rocks from Brazil. 3 pp.--Proc. Acad. Sci., Phila., 1876. --An Unjust Attack. 8 pp.--Am. Geol., Jan., 1889. --The Philadelphia Meeting of the International Congress of Geologists. 10 pp., Am. Geol., June, 1890. --Report of the Berlin International Geological Congress. 13 pp.--Am. Jour. Sci., XXX, December, 1885. --Mesozoic Sandstone of the Atlantic Slope. 9 pp.--Am. Nat., May, 1879. --Archæan-Paleozoic Contact near Philadelphia, Penn. 6 pp., 1 pl.--Proc. A. A. A. S., Vol. XXXIII, Sept., 1884. --Report of the Sub-Committee of the Berlin Congress of Geologists on the Archæan. 80 pp. --Crystallization. 11 pp., Ill.--Journal Franklin Inst., Aug., 1885. --Origin of the Lower Silurian Limonites of York and Adams Counties, 6 pp.--Am. Phil. Soc'y, March 19, 1875. --The Northern Serpentine Belt in Chester County, Pa. 8 pp.--Trans. Am. Inst. Min. Engin., 1883. --The Persistence of Plant and Animal Life under Changing Conditions of Environment. 13 pp.--Am. Nat., June, 1890. --International Congress of Geologists, 1886. 109 pp., 1 pl. --International Congress of Geologists, Reports of the Sub-Committee appointed by the American Committee. 239 pp., 1888. --Other Short Articles. =Frisbie, Dr. J. F.= --Glacial Moraines. 16 pp. --Mountain Building and Mountain Sculpture. 13 pp. --The Franconia Flume, the Causes that led to its Formation. 8 pp. --Planet Building. 11 pp., 1 pl. -- " " 17 pp., 2 pl. =Geikie, Sir Archibald=, LL.D., D.Sc, F.R.S.E., P.G.S. --Address to the Geological Section of the British Association. 23 pp.