428 REVIEWS 



Turner, H. W. A Post-Tertiary Elevation of the Sierra Nevada. Abstract, 

 Science, N. S. Vol. XV, pp. 414, 415, 1902. 



A comparison is made of the grades of the Tuolomne river in Neocene times and 

 the present, showing a grade of 142 feet to the mile for the Neocene, in the 33 miles 

 above the mouth of Piute creek and 92 feet to the mile for the present channel. 

 The Neocene stream flowed in a broad channel making deposits, which indicate 

 comparatively gentle grades, though they are scarcely so marked on this river as 

 on streams farther north. It is thought that the grade was at least as low as that of 

 the modern stream, so that the present grade of the Neocene channel is much greater 

 than the grade at the time it was occupied by the stream, and this must have been 

 brought about by a differential uplift on the east. 



Princeton Paiagonian Reports. Vol. I. Narrative and Geography. 

 By J. B. Hatcher. Published by the University, 1903; 

 pp. 314; pis. L. 



No BETTER augury could be desired for the success of the Princeton 

 Patagonian Reports, the publication of which has been eagerly awaited, 

 than is furnished by this, the initial volume of the series. Although 

 entitled " Narrative and Geography," this handsome volume contains 

 much more than the mere record or field-notes of an explorer's itiner- 

 ary, being as a matter of fact replete with all manner of observations 

 on the natural history, geology and physiography of the region visited. 

 A Nansen, a Stanley, in fact no one short of a trained naturalist could 

 have produced such a work, which is of the order one might expect 

 from a Humboldt or Darwin. Without doubt the present contribution 

 ranks as one of the most noteworthy that has yet appeared concerning 

 the physical and biological features of the lower extremity of the 

 South American continent. 



One cannot review this work of Mr. Hatcher without appreciating 

 the justice of Professor Scott's tribute, who remarks in the editorial 

 preface that, " the whole forms a monument of energy and skill which 

 it is difficult to characterize without using terms which savor of exag- 

 geration." Three large monographs dealing with the rich palaeonto- 

 logical material brought back from South America are promised by 

 Professor Scott, and he further states in regard to Mr. Hatcher's strati- 

 graphic determinations, that they were "most useful, making possible 

 for the first time a rational account of the geology of large areas in 

 southern Patagonia." It deserves also to be remembered, in judging 

 of the extent of these achievements, that an elaborate volume by Drs. 

 A. Ortmann and T. W. Stanton on the invertebrate material has already 

 made its appearance. 



