SCIENC 



Eleventh Year. 

 Vol. XXI. No. oa 



MARCH 17, 1893. 



Contents. 



Where is the Litre ? — A Modern Soiektific 

 Pdzzle-Picture. Stephen H. Emmens 



141 



Presdslibly New Fact Relative to the 

 Cedar Waxwinq iAmpelis Cedrorum'), 

 WITH Remarks upon the Importance of a 

 Thorough Knowledge of First Plumage. 

 Edwin M. Hasbrouck 144 



Dr. George Vasey 145 



Hieroglyphics. 



Jas. W. Donald- 



' Carbohydrates.' 



Electrical Notes 150 



Letters to the Editor. 



Does the Ether Absorb Light ? A. E. Dol- 

 bear .... 150 



Book Reviews. 



Die Zukunft des Silbers. F. W. Taussig . . . 



How to Manage the Dynamo. R. A. F 



Electrical Experiments 159 



Manual of Irrigation Engineering 153 



Among the Publishers 



Entered at the Posi-Offlee of New York. N.Y., as 

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S6»0S5 



■nnastic 



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THE AMERICAN Rhui^:"'''""^^-^ -..,,:, iion of measurements. 



By Frof. Silas W. Holman. 



By DANIEL G. BRINTON, M.D. 



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

 Inter Ocean. 



" Dr. Dani<*l G. Brinton writes asthe acknowledged 

 authority of the subject.^''— Philadelphia Press. 



" The work will be of genuine value to all wbo 

 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, postpaid, $2. 



8vo, cloth, 183 pp. $2.00. 



FOSSIL RESINS. 



This book is the result of an attempt to 

 collect the scattered notices of fossil resins 

 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 



13°. $1. 



N. D. C. HODGES, 



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By William Gilbert, of Col- 

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 8vo, cloth, 425 pp. $4.00, net. 



THE VOLTAIC CELL. 

 Its Capacity and Its Con- 

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 of the latest investigations and 

 discoveries. By Park Benjamin, 

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JNO. WILEY & Ms, NEW YORK. 



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The Ornamental Penman's Pocketbook of Alpha- 

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 THE BEAUTIES OF NATURE, 



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THE THEORY AND PRACTICE OF 



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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 Bv W 

 Perrin Matcock. Part I. With original questions, and ruled pages for notes. 123 Illustrations and Diagrams. 12mo,paper,75'cents. 



PRACTICAL ELECTRIC-LIGHT FITTING 



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

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COAL PITS AND PITMEN. 



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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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