672 RECENT P UBLICA TIONS 



The Succession of Fossil Faunas in the Kinderhook Beds at Burlington, 

 Iowa. Reprinted from Iowa Geological Survey, Vol. X, pp. 63-79. 

 Des Moines, 1900. 



— -White, David. The Stratigraphic Succession of the Fossil Floras of the 

 Pottsville Formation in the Southern Anthracite Coal-Field, Pennsylvania. 

 Pis. 10. (Extract from the Annual Report of the Survey, 1898-9, 

 Part II, General Geology and Paleontology). Washington, 1900. 



— Williams, Henry S. Silurian-Devonian Boundary in North America. 

 Bull. Geol. Soc. of Am., Vol. XI, pp. 333-346. Rochester, May 1900. 



— Woodworth, J. B. Vertebratje Footprints on Carboniferous Shales of 

 Plainville, Mass. Glacial Origin of Older Pleistocene in Gay Head 

 Cliffs, with note on Fossil Horse of that Section. Bull of Geol. Soc. of 

 Am., Vol. XI, pp. 449-460. Pis. 40-42. Rochester, June 1900. 



CORRECTIONS 



1. In his review of Professor Davis' paper on "Glacial Erosion in 

 France, Switzerland and Norway," in the last number of the Journal, 

 the reviewer said (p. 571): "If there is any reference in the paper to 

 similar discordance between main valleys and tributaries not in any 

 way connected with glacial erosion, it escaped the eye of the reviewer." 

 Such reference occurred in the article, on page 283, lines 8-9, in the 

 following words: " It should be noted that discordance of side and 

 main valleys may also be found where a large river has lately been 

 turned to a new path, as in the normal progress of the capture of the 

 upper course of one river by the headward gnawing of the branch of 

 another river (see reference to Russell below), or in the new arrange- 

 ments of drainage lines in a region from which a glacial sheet has 

 lately withdrawn." T. C. C. 



2. In the article on " Methods of Studying Earthquakes," by 

 Professor Davison, the words, "with a large number of observations — 

 they are as a rule," on p. 305, opposite the middle of Fig. 1, should be 

 transposed to the opposite page and inserted after the second line of 

 the first complete paragraph, so as to read : " But the method of 

 intensities does more than this. When the isoseismal lines are care- 

 fully drawn — and this is only possible with a large number of obser- 

 vations — they are as a rule roughly elliptical in form ; their longer 

 axes are parallel or nearly so, but they are not coincident." 



In the eighth line of the same paragraph, " focus " should read 

 " forms." C. • 



