SCIENTIFIC LITERATURE. 



853 



the result of a series of investigations by Drs. 

 0. Lummer and E. Prinr/shein, of Charlot- 

 tenburg, Germany, made with the aid of a 

 grant from the Hodgkins Fund of the Smith- 

 sonian Institution. Besides being of excep- 

 tional importance in thermodynamics, the 

 specific heat ratio is of interest as affording 

 a clew to the character of the molecule. In 

 the present investigation coincident results 

 on the gases examined appear to have been 

 reached for the first time. (Published by the 

 Smithsonian Institution.) 



From the greater lightness of the air and 

 the higher velocity of its currents, it is evi- 

 dent that the materials it may carry and de- 

 posit will be somewhat different in composi- 

 tion and structure from those which are laid 

 down in water. They are as a rule finer, they 

 exhibit a different bedding, and are more 

 capriciously placed. Mr. Johan A ugust Ud- 

 dtn has made a careful study of the subject, 

 the results of which he publishes under the 

 title of The Mechanical Composition 0/ Wind 



Deposits, as the first number of the Augus- 

 tana Library Series, at the Lutheran Augus- 

 tana Book Concern, Rock Island, 111. 



The History Reader for Elementary 

 Schools (The Macmillan Company, 60 cents), 

 prepared by L. L. W. Wilson and arranged 

 with special reference to holidays, contains 

 readings for each month of the school year, 

 classified according to different periods and 

 phases of American history generally, so 

 chosen that some important topic of the 

 group shall bear a relation to the month in 

 which it is to be read. The groups concern 

 the Indians, the Discovery of America, 

 Thanksgiving, Other Settlements (than those 

 of Virginia and the Pilgrims), Dr. Franklin, 

 Lincoln and Washington, the Revolution, 

 Arbor Day, and Brave Sea Captains, etc., 

 closing with articles in reference to Flag 

 Day. The insertion of an article on the 

 War with Spain seems premature. Public 

 sentiment is not yet at rest on the sub- 

 ject. 



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Berry, Arthur. A Short History of As- 

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Byrd, Mary E. Laboratory Manual in 

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Cajori, Florian. A History of Physics 

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Callie, J. W. S. John Smith's Reply to 

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Chapman, Frank H., Editor. Bird Lore. 

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Davenport, Charles B. Experimental 

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Evans, A. H. Birds (The Cambridge 

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Egbert, Seneca. A Manual of Hygiene 

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Foulke, William Dudley. Slav or Saxon: 

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Huntington, Elon. The Earth's Rota- 

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