80 Scientific Intelligence. 



III. Miscellaneous Scientific Intelligence. 



1. The Wilder quarter-century Boole. — A collection of original 

 papers dedicated to Prof. B. G. Wilder at the close of his 25th 

 year of service in Cornell University by some of his former students 

 (D. S. Jordon, Mrs. A. B. Comstock, J. H. Comstock, E. R. Corson, 

 L. O. Howard, Theob. Smith, W. C. Krauss, Mrs. S. P. Gage, 

 H. M. Biggs, P. C. Branner, Y. A. Moore, G. S. Hopkins, P. A. 

 Fish, W. R. Dudley, S. H. Gage). 8vo, pp. 493, 1893. 



The articles are original investigations, in many cases beauti- 

 fully illustrated, in Anatomy, Histology, Bacteriology, Pathology, 

 Embryology, Botany, and Geology; some of them studies of 

 problems of Evolution. Prof. J. C. Branner (Leland Stanford 

 University), contributes valuable observations upon an Erosion in 

 the hydrographic basin of the Arkansas River above Little Rock, 

 Ark. From observations extending from Oct. 1887 to Sept. 1888, 

 it is estimated that the amount of material carried past Little 

 Rock by the river in one year is 28,299,929 tons, not including 

 the mud and sand pushed along the bottom. At this rate of 

 transportation it is estimated that the Arkansas River would 

 remove an average of one foot from its total hydrographic basin 

 in 9433 years. 



Prof. J. H. Comstock (Cornell University) contributes a sugges- 

 tive article on Evolution and Taxonomy, in which a minute com- 

 parison of the venation of the wings of insects is made the basis 

 of their classification and of determining their genetic relations 

 and evolution. 



Prof. S. H. Gage (Cornell University) discusses the habits and 

 structure of the Lamprey* of the fresh water lakes of New York, 

 assumes that the lake Lamprey is a landlocked species and 

 recent offshoot from the true anadromous sea Lamprey. In order 

 to account for this mode of origin the hypothesis is advanced 

 that the ancestors of the Cayuga lake Lamprey were spawn 

 deposited by the s^a Lamprey which ascended the Susquehanna 

 River at the geological time when Cayuga Lake emptied through 

 it to the Atlantic ; that they were landlocked by the opening of 

 a lower exit for the waters through the Mohawk and retreat of 

 the glacier northward, and then became adjusted to completely 

 fresh water habitat. w. 



Obituary. 



Dionys Stttr, the vetei'an geologist and paleontologist of 

 Vienna, and late director of the K.K. geologische Reischsanstalt 

 of Austria, died at Vienna October 9th, 1893. 



John Tyndall, the famous physicist, whose lucid and graceful 

 style has made the reading public familiar with many of the 

 abstruse problems of modern science, died at Haslemere, England, 

 on December 4th, 1893, age 73 years. 



Erratum. — On page 54, line 14, read in for to. 



