Apeil 5, 1907] 



SCIENCE 



537 



the nickel is recognized in the filtrate by add- 

 ing a little piece of solid caustic soda. In the 

 acid analysis the acids are classified by the 

 character of their barium and silver salts, and 

 their most characteristic reactions well dis- 

 cussed. 



Part IV., the appendix, contains the prepa- 

 ration of reagents, specific gravity and solu- 

 bility tables, and considerable physical data. 

 In the strength of reagents, it is gratifying to 

 see that another convert has been added to the 

 comparatively few teachers who have adopted 

 the Eeddrop system of normal reagents. The 

 great advantage of the system is that the stu- 

 dent knows the strength of the reagents he 

 is using, and soon comes to avoid the use 

 of great excess. Unconsciously he becomes 

 familiar with the elements of volumetric 

 analysis. The strengths recommended by the 

 author differ a little from those originally sug- 

 gested by Eeddrop. For dilute acids and alka- 

 lies, 4 N solutions are used, and for salts N/2 

 generally. The ordinary reagents are N. In 

 this laboratory 5N for acids, 5/2 N for alka- 

 lies, and N/5 for most salts have been found 

 convenient. 



The press work of the book is excellent and 

 typographical errors are very few. There is 

 a complete index. 



Jas. Lewis Howe 



Washington and Lee Univebsitt, 

 Lexington, Vibginia 



SGIENTIFW JOURNALS AND ARTICLES 

 The March number (volume 13, number 6) 

 of the Bulletin of the American Mathematical 

 Society contains the following articles : Report 

 of the Thirteenth Annual Meeting of the 

 American Mathematical Society, by F. N. 

 Cole; Eeport of the December Meeting of the 

 Chicago Section, by H. E. Slaught; ' The De- 

 composition of Modular Systems Connected 

 with the Doubly Generalized Fermat The- 

 orem,' by E. H. Moore; ' Systems of Extremals 

 in the Calculus of Variations,' by Edward 

 Kasner; 'A Necessary Condition for an Ex- 

 tremum of a Double Integral,' by Max 

 Mason; Shorter Notices; Nielsen's Hand- 

 buch der Theorie der Gammafunktion, by 



Virgil Snyder; Jouffret's Melanges de Geome- 

 trie a Quatre Dimensions, by Peter Field; 

 Lanner's Neuere Darstellungen der Grund- 

 probleme der reinen Mathematik im Bereiche 

 der Mittelsehule, by D. E. Smith; Reform- 

 vorschlage fiir den mathematischen und natur- 

 wissenschaftlichen TJnterricht, entworfen von 

 der Unterrichtskommission der Gesellschaft 

 deutscher Naturforscher und Aerzte (Zweiter 

 Teil), by J. W. A. Young; de Peslouan's N. 

 H. Abel, sa Vie et son Oeuvre, by Florian 

 Cajori ; ' Notes ' ; ' New Publications.' 



The April number contains : Report of the 

 February Meeting of the American Mathe- 

 matical Society, by F. N. Cole; 'The Con- 

 struction of a Field of Extermals about a 

 Given Point,' by G. A. Bliss; 'Some Par- 

 ticular Solutions in the Problem of n Bodies,' 

 by W. R. Longley ; ' On the Matrices of Pe- 

 riod a Power of p in Jordan's Linear Con- 

 gruence Groups, Modulo p",' by Arthur 

 Ranum; ' On the Construction of an Integral 

 of Lagrange's Equations in the Calculus of 

 Variations,' by D. C. Gillespie; 'Algebraic 

 Numbers and Forms ' (Review of Bachmann's 

 AUgemeine Arithmetik der Zahlenkorper and 

 Konig's Einleitung in die allgemeine Theorie 

 der Algebraischen Grossen), by L. E. Dick- 

 son; 'Notes'; 'New Publications.' 



SOCIETIES AND ACADEMIES 



THE AMERICAN CHEMICAL SOCIETY, NEW YOKE 



SECTION 



The fifth regular meeting of the session of 

 1906-07 was held at the Chemists' Club, 108 

 W. 55th Street, on March 8. 



Pursuant to the amendment to the by-laws 

 of the section adopted February 8, the an- 

 nual election of officers, to assume their duties 

 at the close of the June meeting following, 

 was held with the following result: 



Chairman — ^H. O. Sherman. 

 Vice-Chairman — F. J. Pond. 

 Secretary and Treasurer — C. M. Joyce. 

 Executive Committee — ^Virgil Coblentz, 6. C. 

 Stone, C. H. Kiessig, Durand Woodman. 



The chairman called attention to the great 

 loss to the society occasioned by the untimely 

 death of its honorary member, Henri Moissan, 



