

Eleventh Year. 

 Vol. XXI. No. 534. 



APEIL 28, 1893. 



Single Copies, Ten Cents. 

 $3.50 Per Year, in Advance. 



Contents. 



Sun-Heat and Orbital Eccentricity. Ellen 



A Physiological Classification of the 

 Ophidia — With Special Reference to the 

 Constrictive Habit. Arthur Stradling. . . i 



Notes and News. 



ERS AND Moles in 

 N. F. L. Washburn 230 



One of the Gypsum Crystals from the Cave 

 at South Wash, Wayne Co., Utah. Al- 

 fred J. Moses 230 



Distance and Color Perception by Infants. 



J. Mark Baldwin 331 



Letters to the Editor. 



The Convex Profile of Bad-Land Divides. 



L.E.Sicks 233 



The Moon's Atmosphere. TF. H.Howard.. 333 

 Note on the Crystalline Lens of the Eye. 



R.W.Shufeldt 233 



The Aurora. M. A. Veeder 233 



Where is the Litre? Stephen H. Emmens.. 234 

 Sham Biology in America. Henri/ F. Osborn. 234 



Cedar Wax-wings. P. L. Hatch 235 



An Appeal to Naturalists. Charles Sedg- 



wick Minot. 



Book Reviews 235 



Entered at the Fost-Offloe of New York, N.Y., 

 Second-Class Mail Matter. 



NEO-DARWINISM AND KEO-LAMARCKISM. 



By LESTE-i F. WARD. 



Annual address of the President of the Biological 

 Society of Washington delivered Jan. 24, 1891. A 

 historical and critical review of modem scientific 

 thought relative to heredity, and especially to the 

 problem of the transmission of acquired characters. 

 The following are the several heads involved in the 

 discussion Status of the Problem, Lamarckism. 

 Darwinism, Acquired Characters, Theories of He 

 redity, Views of Mr. Galton, Teachings of Profes^^or 

 Weismann, A Critique of Weismann, Neo-Darwin- 

 ism, Neo-Lamarckism, the American "School," Ap- 

 plication to the Human Race. In so far as views 

 are expressed they are in the main in line with the 

 general current of American thought, and opposed 

 to the extreme doctrine of the non-transmissibility 

 of acquired characters. 



Price, postpaid, 25 cents. 



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



SUMMER INSTRDCTION IN PHYSICAL 



The Chemical and Physical Laboratories 

 of the Case School of Applied Science will be 

 open from July 6 to Aug. 17, and instruction 

 in Elementary or Advanced Chemistry, 

 Physics and Mathematics will be given spe- 

 cially adapted to the wants of teachers. 

 Persons attending these courses are offered 

 the same facilities for practical study as are 

 open to regular students. 



For circulars or further information, address 

 Professor CHAS F. MABEEY, 

 Chemical Laboratory, 

 Case School of Applied Science, 



Cleveland, 0. 



nSEFCTI. HAND-BOOKS. 



The Ornamental Penman's Pocketbook of Alpha- 

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 SPON & CHAMTBERLAIN, PubUshers, 12 Cortlandt 

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MACMILLAN & CO.'S NEW BOOKS. 



Fourth Edition of Sir John Lubbock's New Book. 

 THE BEAUTIES OF NATURE, 



AND THE WONDERS OF THE WORLD WE LIVE IN. By Bight Hon. Sir John Lubbock, M.P., P.R.S. With numerous Illustrations 

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THE THEORY AND PRACTICE OF 



ABSOLUTE MEASUREMENTS IN ELECTRICITY AND MAGNETISM. 



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ELECTRICAL PAPERS. 



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THE VISIBLE UNIVERSE. 



Chapters on the Origin and Construction of the Heavens. By J. Ellard Gore. With Stellar Photographs and other Illustrations 



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ELECTRIC LIGHTING AND POWER DISTRIBUTION. 



An Elementary Manual for Students preparing for the ordinary grade examination of the City and Guilds of London Institute. By W. 

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PRACTICAL ELECTRIC-LIGHT FITTING. 



A Treatise on the Wiring and Fitting-up of Buildings deriving currents from Central Station Mains, and the Laying-down of Private 

 Installations, including the latest edition of the Phoenix Fire Office Rules. By F. C. Allsop. With 224 Illustrations. 12mo,$1.50. 



COAL PITS AND PITMEN. 



A Short History of the Coal Trade and the Legislation Affecting It. By R. Boyd Nelson. 13mo, $1.00. 



PIONEERS OF SCIENCE. 



By Oliver Lodge, F.R.S., Professor of Physics in Victoria University College, Liverpool. With Portraits and Illustrations. 



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