350 liecerd Puhl'tcations. 
L . Webster . July No. Megalithic monuments of Brittany. Thomas 
Wilson. Dr. N. O. Holt's studies in glacial geology. Dk. Josua Lin- 
da iil. 
4. Excerpts and individual publications . 
^Microscopic petrography of the drift of central Ontario. By A. P. 
Coleman. Trans. Roy. Soc. Canada, Mny, 1887. Two colored plates of 
thin sections. 
On the rocks occurring in the neighborhood of Ilchestor, Howard coun- 
ty, Maryland ; being a detailed study of the area comprised in sheet No. 
16 of the Johns Hopkins University map. By Wm. H. Hobbs. 
Keport on the water-power of St. Louis river. (Minnesota) John Bir- 
kinbine. 34 pages, with map. 
A history of New Brunswick geology. By R. W. Ells, of the Geol. 
Survey of Canada. 64 pp. Montreal. 
Bulletin of the scientific laboratories of Denison University, Yo\.m.\Zl 
pp. 15 plates; contains the Clinton group of Ohio, Part IV, chemical and 
stratigraphical geology and geographical paleontology. By A. F. Foerste; 
the geology of Licking county, Parts III. and IV. Sub-Carboniferous and 
AVaverly groups. By C. L. Ilerrick ; Notes on paleozoic fossi!s, By A. F. 
Foerste. 
Changes of Level of the Great Lakes. G. K. Gilbert. The Forum, 
June, 1888. 
Geological history of the Yellowstone National Park. By Arnold 
Hague. Trans. Am. Inst. Min. Engineers. Vol. xvi, 1888. 
Values in classification of the stages of growtli and decline with propo- 
sitions for a new nomenclature. Alpheus Hyatt. Proc. Bos. Soc. Nat. Hist. 
March, 1888. 
Evolution of the faunas of the Lower Lias. Alpheus Hyatt. Proc. Bos. 
Soc. Nat. Hist. Vol. xxiv, 1888. 
The coals of Colornda. By J. S. Newberry. School of Mines Quarterly, 
Vol. ix, July, 1888. 
The Gi'eat Lakes and their relations to the lakes and gulf water-way. 
Osian Guthrie. 8 vo. 31 pp. 1888. 
The ethical functions of scientific study. Address of president Thomas 
C. Chamberlin, of Wisconsin state university at the annual commencement 
of University of Michigan. Ann Arbor, published by the university, 1888. 
On the joint structure of rocks. 8 vo., 5 pp. W. O. Crosby. 
Methods of instruction in minera'ogy and structural geology in the Mass- 
achusetts institute of technology. Head before the Am. Soc. of Naturalists, 
New Haven, Dec. 29, 1887. W. O. Crosby. 
Geology of the outer islands of Boston Harbor. Proc. Bos. Soc. Nat. 
Hist. Vol. xxiii, 1888. W. O Crosby. 
Quart/ytes and siliceous concretions. Technology Quarterly, May, 1888. 
W. O. Crosby. 
The geology of the Black Hills. W. O.Crosby. Proc. Bos. Soc. Nat. 
Hist. Vol. xxiii, 1888 
The glacial stri;c of the Lackawanna— Wyoming region. Pi of. John C. 
Branner. Proc. Lackawanna Inst. Hist, and Sci. Vol. i. 
