NATIONAL GEOGRAPHIC MAGAZINE 



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SCIENCE 



A JOURNAL DEVOTED TO THE ADVANCEMENT OF SCIENCE. 



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From its first appearance, in 1883, Science has maintained a repre- 

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Its Editors and Contributors come from every institution in this country 

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EDITORIAL COMMITTEE. 



S. Newcomb, Mathematics ; R. S.Woodward, Mechanics ; E-C. Pickering, Astronomy 

 T. C. Mendenhaee, Physics ; R. H. Thurston, Engineering ; Ira Remsen, Chemis- 

 try ; J. Le ConTE, Geology ; W. M. Davis, Physiography ; Henry F. Osborn, 

 Paleontology; W. K. Brooks, C. Hart MERRIAM, Zoology; S. H. 

 SCUDDER, Entomology ; C. E. BESSEY, N. L. BriTTON, Botany ; C. S. 

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NEW AND POPULAR SCIENTIFIC BOOKS. 



HARDIN 



The Liquefaction of Oases. Its Rise 

 and Development. By WileET h- 

 Hardin, Ph.D., University of Penn- 

 sylvania. Cloth, i2mo, $1.50. 



A popular yet complete account of the methods 

 used in the liquefaction of air, among other 

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GANONG 



The Teaching Botanist. A Manual 

 of information upon Botanical In- 

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 Ganong, Ph.D., Smith College. 



Cloth, i2mo, $1.10 net. 



A manual of information upon botanical in- 

 struction, with outlines and directions for an 

 elementary course. 



MACBRIDE 



The Slime Moulds. A Handbook of 

 North American Myxomycetes. By 

 Thomas H. MacBride, Professor of 

 Botany, University of Iowa. 

 Cloth, i2mo. 

 A list of all species described in North 

 America, including Central America, with an- 

 notations. 



SUTER 



Handbook of Optics. For Students 

 of Ophthalmology. By WirXiAM N. 

 SuTER, M. D., National University, 

 Washington, D. C. 



Cloth, i2mo, $1.00 net. 



Aims to give a clearer insight into the phenom 

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 than can be obtained from the usual text-books on 

 Refraction of the eye. 



THE MACMILLAN COMPANY, Publishers, NEW YORK, 



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