rE 



uinasnj^ tBaoit'e>J Aj-B.iqil 



Eleventh Yeak. 

 Vol. XXI. No. 530. 



MARCH 31, 1893. 



Single Copies, Ten Cents. 

 $3.50 Per Year, in Advance. 



Contents. 



On the Ethnological Characterlstics of the 

 Human Nasal Canals, Considered as an 

 Economic Adaptation. William C. Brais- 



The Effect on the College Curriculum 

 of the Introduction of the Natural 

 Sciences. W. L. Foteat ■ 



The Marine Biological Laboratory.— Sixth 

 Season, 1893 



Electrical Notes 



Notes and News ■ 



Hydrographic Area of the Rio Wanque or 

 Coco in Nicaragua. J, Crawford : 



Natural and Artificial Cements in Canada. 

 H. Peareih Briimell ■ 



Letters to the Editor. 



Prehistoric Remains in America. Cyrus 



Thomas - ■ 



Some More Infinitesimal Logic. A. S. Hath- 



aivay 



Color of Flowers. Jeanne Neal : 



Book Reviews. 



Extinct Monsters 



Advanced Lessons in Human Physiology — 



Primary Lessons in Human Physiology 



Interpretation of Nature 



Formation of the Union, 1750-1822 



Proof of Evolution 



Among the Publishers 



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

 Second-Class Mail Matter. 



THE AMERICAN RACE. 



By DANIEL G. BRINTON, M.D. 



" The book is one of unusual interest aod, value.'"— 

 Infer Ocean. 



" Dr. Daniel G. Brinton writes asthe acknowledged 

 authority of the subject." — Philadelphia Press. 



" The work will be of genuine value to all who 

 wish to know the substauce of what has been found 

 out about the indigenous Americans. "—iVafwre. 



"A masterly discussion, and an example of the 

 successful education of the powers of observation." 

 — Philadelphia Ledger. 



Price, postpaid, S2. 



FOSSIL RESINS. 



This book is the result of an attempt to 

 collect the scattered notices of fossil resius, 

 exclusive of those on amber. The work is of 

 interest also on account of descriptions given 

 of the insects found embedded in these long- 

 preserved exudations from early vegetation. 



By CLARENCE LOWN and HENRY BOOTH 



12°. SI. 



Electrical 



Books. 



48 Page Catalogue Sent Gratis 

 on application. 



D. VAN NOSTRAND CO., 



23 MURRAY STREET, 

 27 WARREX STREET, 



New York. 



N. D. C. HODGES, 



874 Broadway, New York. 



USEFUl. HAND-BOOKS. 



The Ornamental Penman's Pocketbook of Alpha- 

 bets, for sign-writers, engravers, stone-cutters and 

 draftsmen, 20 cts. A System of Easy Lettering, by 

 Howard Cromwell, 50 cts. Practical Electrics : A 

 UniTcrsal Handybook on Erery-day Electrical Mat- 

 ters, 135 pp., fully illustrated, ]2mo, cloth. 75 cts. 

 Notes on Design of Small Dynamo, by G. Halliday, 

 79 pp., with a number of plates to scale, 12mo, cloth, 

 ^1. The Phonograph and How to Construct It, by 

 W. Gillett, 87 pp., 12 folding plates, 12mo, cloth, $2. 

 SPON & CHAMBERLAIN, Publishers, 12 Cortlandt 

 St., New York. Illustrated and descriptive cata- 

 logues, 10 cts. 



QUERY. 



Can any reader of Science cite 

 a case of lightning stroke in 

 whicli the dissipation of a small 

 conductor (one-sixteenth of an 

 inch in diameter, say,) has failed 

 to protect between two horizon- 

 tal planes passing through its 

 upper and lower ends respective- 

 ly? Plenty of cases have been 

 found which show that when the 

 conductor is dissipated the build- 

 ing is not injured to the extent 

 explained (for many of these see 

 volumes of Philosophical Trans- 

 actions at the time when Lght 

 ning was attracting the attention 

 of the Royal Society), but not 

 an exception is yet known, al- 

 though this quer}^ has been pub- 

 lished far and wide among elec- 

 tricians. 



First inserted June 19, 1891. No re- 

 sponse to date. 



N. D. C. HODGES, 874 BROADWAY, N. Y. 



SCIENCE 



More than one thousand of the lead- 

 ing scientific men and women of Amer- 

 ica and Europe have agreed to contrib- 

 ute to the paper during the coming year; and, 

 as others are constantly joining in this move to 

 make the paper more valuable than ever, it can- 

 not be long before there will be over twO thou- 

 sand competent users of this weekly 

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Send 50 cents (in postage stamps, if most convenient) for two 

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N. D. C. HODGES, 874 Broadway, New York. 



