SCIEN 



Tenth Year. 

 Vol. XX. No. 513. 



DECEMBER -^ 1893. 



JopiEs, Ten Cents. 

 $3. .50 Per Year, in Advance. 



Contents. 



Immunity from Leprosy of the Fifth Genera- 

 tion. Albert S. Ashmead i 



The Influence of the Moon on Rainfall— A 

 Symposium, I. — Mansfield Merriman. II. — 



H. A. Hazen ; 



Recent Botanical Explorations in Idaho. D. 



T. Macdoitgal '• 



Birds that Sing in the Night. Morris Gibhs . . ', 



Notes and News \ 



Statistics of the Mississippi River. H. L. 



Whiting J 



On the Use of the Compound Eyes of Insects. 



R. T. Lewis ; 



Turkish Time-Pieces. F. A. Seely ; 



Notes upon the Action of Drugs and Agen- 

 cies UPON the Respiratory Movements. 



Horatio C. Wood i 



Letters to the Editor. 



Man and the Glacial f*eriod. W. J. McGee.. i 

 Pseudaurora Borealis; or, What was It? P. 



L. Natch ; 



The Humming Bird's Food. Frank Bolles.. \ 



Sense of Direction. John T. Campbell i 



Electrical Phenomena on the Mountains of 



Colorado. (?eo. H. Stone ', 



The Gila Monster. Mai'cus E, Jones ! 



Grand-Gulf Formation. Wm. H. Dall ; 



Book Reviews. 



A Course on Zoology , ; 



Chemical Theory for Beginners f 



An Introduction to Chemical Theory ! 



Among the Publishers J 



Entered at the Poar-Offlce of New York, N.Y., 

 Second-Class Mail Matter. 



RACES AND PEOPLES. 



By DANIEL G. BRINTON, M.D. 



"The book is good, thoroughly good, and will long 

 remain the best accessible elementary ethnography 

 in our language."— T/ie Christian Union. 



"We strongly recommend Dr. Brinton's 'Races 

 and Peoples' to both beginners and scholars. We 

 a,re not aware of any other recent work on the 

 science of which it treats in the English language." 

 — Asiatic Quarterly. 



"His book is an excellent one, and we can heartily 

 recommend it as an introductoiy manual of ethnol- 

 ogy-"— ^'/te Monist. 



"A useful and really interesting work, which de- 

 serves to be widely read and studied both in Europe 

 and A.m.QviQ&y— Brighton (Eng.) Herald. 



"This volume is most stimulating. It is written 

 with great clearness, so that anybody can under- 

 stand, and while in some ways, perfoi'ce, superflcial, 

 grasps very well the complete field of humanity." — 

 77ie iVew York Times. 



"Dr. Brinton invests his scientific illustrations and 

 measurements with an indescribable charm of nar- 

 ration, so that 'Races and Peoples.'' avowedly a rec- 

 ord of discovered facts, is in reality a strong stim- 

 ulant to the imagination."— Philadelphia Public 

 Ledger. 



" The work is indispensable to the student who re- 

 quires an intelligent guide to a course of ethno- 

 graphic Te&ding.""— Philadelphia Times. 



Price, postpaid, $1.75. 



THE AMERICAN RACE. 



By DANIEL G, BRINTON, M.D. 



" The book is one of unusual interest and value." — 

 Inter Ocean. 



" Dr. Dani»l Q. Brinton writes as the acknowledged 

 authority of the suhject.''''— Philadelphia Press. 



" The work will be of genuine value to all who 

 wish to know the substance of what has been found 

 out about the indigenous Americans." — Nature. 



"A masterly discussion, and an example of the 

 successful education of the powers of observation." 

 — Philadelphia Ledger. 



Price, po§tpaid, $2, 



». D. C. HODGES, 874 Broadway, N. Y. 



SCIENCE 



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