SCIENCE 



Sixth Year. 

 Vol. XI. No. 261. 



NEW YORK, FEBRUARY 3, li 



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Sanitary Supervision of Schoolhouses and Pupils. — Newly dis 

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Asa Gray 

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Handbook of Republican Institutions in the United States 

 Organic Analysis . . . ■ 



Elementary Chemistry 

 Practical Chemistry 

 Down the Islands 

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51 



51 



Notes and News 

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A New Meteorite from Texas 



Jacobson's ' Higher Ground ' 



Weather-Predictions 



Hybrid Diseases . 



Color-Blindness . 



A New Text-Book on Zoology 



The Flight of Birds 



54 



. Ward &° Howell 



A ugustus Jacobson 



H . Helm Clayton 



William Trelease 



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Binocular Combinations upon Disparate Reiinal Points 



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 Bacteriology as a Study in Schools . . Theobald Smith 



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The Science Company, Publishers, /}.'/ Lafayette Place, New York. 



London apent : G. E. Stechert, 26 Kino^ William St., Strand. 



RICHTER'S INORGANIC CHEMISTRY. 



WITH 89 ILLUS. AND A COLOR bu""'"Jt 



A Text-book for Students. By Prof. Victor von 

 RiCHTER, University of Breslau. Authorized Translation. 

 By Edgar F. Smith, m.a., ph.d,, Prof, of Chemistry, 

 Wittenberg College, Springfield, Ohio, formerly in the 

 Laboratories of the University of Pennsylvania and 

 Muhlenberg College. Mem. Chem. Societies of Berlin 

 and Paris, Acad. Nat. Sci., Philadelphia, etc. 



In most of the chemical text-books of the present day, one of the striking features 

 and difficulties with which teachers have to contend is the separate presentation of 

 the theories and facts of the science. In this work, which has been received with 

 such hearty welcome, theory and fact are brought close together, and their intimate 

 relation clearly shown. From careful observation of experiments and their results, 

 the student is led to a correct understanding of the interesting principles of chemistry. 

 The descriptions of the various inorganic substances are full, and embody the results 

 of the latest discoveries. The periodic system of Mendelejeff and Lothar Meyer 

 constitutes an important feature of the book. The- thermo-chemical phe 

 the various groups of elements also receive proper consideration, both in the 

 to chemical affinity and the law of periodicity. 



Third Amer ^.ip^os .^ the Fifth German Edition. 



. '•■? U,J. "Pf/,,. _ 



f^i^L, -'"o. 



''!'!'(, 



'■•^'s; 



SPECTRA. 12mo. CLOTH, $2.00. 



A. Genth, Prof, of Chemistry, and F. A Genih, Jr.^ Ass't Prof, of 

 Cketnistry, University of Pennsylvania. 

 "We have examined with much care the ' Inorganic Chemistry ' of Prof . Victor 

 von Richter, recently translated by Dr. E. F. Smith, Both theoretical and general 

 chemistry are treated in such a clear and comprehensive manner that it has become 

 one of the leading text-books for a University course in Germany. We are indebted 

 to Dr. Smith for his translation of this excellent work, which may help to facilitate 

 the study of chemistry in this country." 



■ It is decidedly £ 



From Prof. B. Sillinian, Vale College., New Haven^ Conn.- 

 good book, and in some respects the best manual we have." 



Front Prof. E. P. Harris,, AniJierst College., Amherst, Mass, 



'' 1 have been acquainted with the original, both Inorganic and Organic, since their 

 first publication, and have ever since regarded them both as the best books published 

 in'those departments.'* 



Richter's Inorganic Chemistry is recommended at Yale College, New Haven, Conn, j 

 Rennsselaer Polytechnic Institute, Troy. N. Y.; University of Pennsylvania, Phila- 

 delphia; Swarthmore College, near Philadelphia; Wisconsin State University, Madi- 

 son; Trinity College, Hartford, Conn.; Johns Hopkins Ui 

 etc., and many other schools and colleges. 



Baltir 



CHEMISTRY OF THE CARBON COMPOUNDS, or, Organic Chemistry. 



A complete Text-book and Laboratory Guide for Students. From the Fourth German Edition. By same author 

 and translators. Illustrated. Cloth, $3.00. 



*** Complete descriptive Circulars of these books, and catalo^e of chemical books, sent free itp>on application. 



P. BLAKISTON, SON & CO., Publishers, 



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