Recent Publications. 



-BiDDLE, H. C. The Determination of Molecular Weights, [Reprinted 

 from Am. Chemical Jour., Vol. XXIX, April, igo3.] 



-CuMMiNGS, Edgar RoscoE. The Morphogenesis of Platystrophia. A Study 

 of the Evolution of a Paleozoic Brachiopod (with 27 figures). [From 

 the Amer. Jour, of Sci., Vol. XV, February, 1903.] 



-Campbell, Marius R. Reconnaissance of the Borax Deposits of Death 

 Valley and Mohave Desert. [Bull. No. 200, U. S. Geol. Surv., Wash- 

 ington, igo2.] 



-Calloway, C. The Platonic Complex of Central Anglesey. [Quart. 

 Jour. Geol. Soc, Vol. LVIll, pp. 662-79, and map, November, 1902.] 

 On a Cause of River Curves. [Extract from the Geol. Mag., Decade IV, 

 Vol. IX, No. 460, p. 450, October, 1902.] 



-Clarke, Frank W. A New Law in Thermochemistry. [Proc. of the Wash- 

 ington Acad, of Sci., Vol. V, pp. 1-37, January, 1903.] 



-CoNDRA, G. E. New Bryozoafrom the Coal-measures of Nebraska. [From 

 the American Geologist, December, 1902.] 



-Coleman, A. P. The Duration of the Toronto Interglacial Period. 

 [From American Geologist, February, 1902.] 



Rock Basins of Helen Mine, Michipicoten, Canada. [Bull. Geol. Soc. 

 of Am., Vol. XIII, pp. 293-304, Plate 45 ; Rochester, 1902.] 



-Clark, W. B., and Bibbins, A. Geology of the Potomac Group in the 

 Middle Atlantic Slope. [Ibid., pp. 187-214, Plates 22-8 ; Rochester, 

 1902.] 



— AND Martin, G. C. Correlation of the Coal Measures of Maryland. 

 [Ibid., pp. 215-32, Plates 29-39; Rochester, 1902.] 



-Crammer, Hans. Das Alter, die Entstehung und Zerstorung der 

 Salzburger Nagelfluh. [Separat-Abdruck aus dem Neuen Jahrbuch 

 fiir Mineralogie, Geologie, und Paleontologie, Beilage-Band XVI ; 

 Stuttgart, 1903.] 



-DiLLER, Joseph S. Topographic Development of the Klamath Mountains. 

 [Bull. No. 196, U. S. Geol. Surv., Washington, 1902.] 



-Dale, T. Nelson. Structural Details in the Green Mountain Region and 

 in Eastern New York. [Bull. No. 195, U. S Geol. Surv., Washington, 

 1902.] 



-Daly, Reginald A. The Mechanics of Igneous Intrusion. [From the 

 Am. Jour, of Sci., Vol. XV, April, 1903.] 



-Ells, R. W. The Progress of Geological Investigation in Nova Scotia. 

 [From the Trans, of the Nova Scotian Institute of Sci., Vol. X, Ses- 

 sion 1901-2.] 



-Geological Society of America, Bulletins of the. Proceedings of the 

 Fourteenth Annual Meeting, Held at Rochester, N. Y., December 31, 

 1 90 1, and January i and 2, 1902, Including Proceedings of the Third 



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