n SCIENCE—ADVERTISEMENTS 
Waves of the Sea and other 
Water Waves 
By VAUGHAN CORNISH, 
Doctor of Science, Manchester University 
Fifty illustrations from phot: graphs taken by theauthor. Cloth, pp. 375. Price, $2.60 net. 
A critical examination of observations and measurements of waves and the discovery of the mode of their 
production. The facts he:e set down iv a very interesting manner are the results of fifteen years’ study of 
wave action in lakes and rivers as weil as upon the ocean at different latitudes. 
A few of the topics ably presented are : — 
SIZE and SPEED of DEEP SEA WAVES; the numerical relation between length of fetch of wind and 
height of storm waves; the wave length of the swell which reaches shores after storms: the give and 
take between air and water in the development of waves; the effect of squalis and gusts upon waves. 
Onth actio of sea waves totransportshingle, sand and mud. The building up of beaches—the undertow. 
Stationary and progressive waves \n rivers, flood waves, tidal bores, cross-stream progressive waves, eounds 
of running water, the yushin 
motion of cataracts, whiils and 
eddies, conical structures pro 
duced by the breaking up ot a ORDER BLANK 
waterfall, the wave track of a OPEN “OURT PUBLISHING CO. 
ship. ! 623-633 S. Wabash Ave., Chicago 
This book offers an attractive 
introduction to physiography aud 
the study of more difficult wave 
phenomena in earthquakes. atmo- 
spheric disturbances, as well as 
wave action in relation to engi- 
neering structures. 
SECOND EDITION, NOVEMBER, 1910 
AMERICAN MEN OF SCIENCE 
A BIOGRAPHICAL DIRECTORY 
EDITED BY J. McKEEN CATTELL 
A Biographical directory requirea revision if it is to maintain ws usefulness. Nearly a third of the names én the 
present edition are new, and the iecnes which appeared in the first division have tn nearly every case been revised. The 
amount of work required to prepare the revision has been as great as thal given to the first edition. There has been no 
change in the general plan of the work. Greater strictness has been observed in confining its scope to the natural and 
exact sciences, and for this reason a few names included in the first edition have been omuted. Efforts have been exerted to 
make the book as complete and accurate as possible. There are of course omissions, if only because some men will not 
cepiy coe to repeated requests for the information needed. The thousand leading men of science have been again selected 
by the methods that were used before, and stars have been added to the subjects of research in the case of 269 new men who 
have obtained places on the list. The editor’s object in selecting this group 0° acientific men has been to make a study of 
the conditions on which scientific research depends and so far as may be to emprove these conditions. ‘There are printed in 
an appendix the two statistical studies that have been made.—From the Preface to the Second Edition. a 
The second edition of the Directory extends to more than 600 pages and contains more than 5500 sketoher 
hi is well printed on all rax paper and bound in buckram with leather label. Although the work has been 
tnerersed in size by more than 50 per cent., it issold at the same price as the first edition. 
Price: Five Doliars, net, Postage paid 
THE SCIENCE PRESS 
GARRISON, N. Y. LANCASTER, PA. 
SUB-STATION 84, NEW YORK CITY. 
_ Kindly send me a copy of Waves of the Sea, for which I enclose postal 
