Recent Publications. 



-Cannon, George L. Jr. 



The Geology of Denver and Vicinity. 36 pp. 

 -Carter, Oscar C. S. 



Anthracite Coal near Perkiomen Creek. 5 pp. — From Journal of the 

 Franklin Institute, August, 1894. 



-Curtis, George E. 



A Problem in Mechanical Flight. 1 1 pp. — From Annals of Mathematics 

 Vol. VIII., No. 6. 



-Geological Surveys : 

 New South Wales. 



Records of Geological Survey, Vol. IV., Part II., 1894. Department 

 of Mines and Agriculture. 74 pp., 2 Plates, and Catalogue of Mining 

 Maps. 



-Grimsley, George Perry. 



The Granites of Cecil county in Northeastern Maryland. (A thesis 

 accepted for the degree of Doctor of Philosophy, by the Johns Hop- 

 kins University, June, 1894.) 50 pp. with Plates. — From the Journal 

 Cin. Soc. Nat. Hist., April and July, 1894. 



-Hovey, E. O. 



A Study of the Cherts of Missouri. 9 pp. — From the Am. Jour. Sci., 

 Vol. XLVIII., November, 1894. 



-James, Joseph, F., M.Sc, F.G.S.A., etc. 



Remarks on the Genus Arthrophycus, Hall. 5 pp. — From Jour. Cin. 

 Soc. Nat. Hist., July-October, 1893. 



Knowlton, F. H. 



A New Fossil Hepatic from the Lower Yellowstone in Montana. 2 pp. 

 and Plate.— From Bull, of the Torrey Botanical Club, Vol. XXL, No. 

 10, October 24, 1894. 



-Leffingwell, Albert, M.D. 



Physiology in Our Public Schools. 4 pp. — From Journal of Education, 

 Boston, Mass. 



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