January 24, 1902.] 



SCIENCE. 



145 



Zoologically the tendency is healthy. For 

 the student's time will be set free to investi- 

 gate collections of specimens from other 

 standpoints than that of assigning each its 

 name, animated by the desire to produce the 

 longest possible list. Variations in a form will 

 be studied as modifications adapted to par- 

 ticular environments. In museums the speci- 

 mens can then be arranged, not as objects with 

 so many long names as appendages, but as 

 illustrating vital principles of natural his- 

 tory. 



j. e. duerden. 



Johns Hopkins Univebsitt, 

 Baltimohe, Md. 



GENERAL. 



A NEW edition of Stieler's Handatlas to 

 contain 100 copper-plate maps is now in course 

 of publication by Perthes of Gotha, in fifty 

 parts; the price of the complete work being 

 30 Marks. Half the maps are newly projected 

 and engraved. All of them have relief in 

 brown, in order to make the names in black 

 more legible. In preparation for binding, each 

 sheet has its title printed on the right corner 

 of the back, with on outline map that indicates 

 the location of the sheet and of the neigh- 

 boring sheets with their numbers. The pres- 

 ent edition is the ninth of this valuable work; 

 the first having been completed by Stieler in 

 1831. Later editions were by Stiilpnagel. 

 Petermann, Berghaus and Vogel. 



SCIENTIFIC JOURNALS AND ARTICLES. 



The January (opening) number of Vol. III. 

 of the Transactions of the American Mathe- 

 matical Society contains the following papers: 

 'On a Class of Automorphic Functions,' by 

 J. I. Hutchinson; 'Concerning the Existence 

 of vSurfaces Capable of Conformal Representa- 

 tion upon the Plane in such a Manner that 

 Geodetic Lines are Represented by a Pre- 

 scribed System of Curves,' by H. F. Stecker; 

 'Zur Erklarung du Bogenlange und des 

 Inhaltes einer krummen Flache,' by 0. Stolz ; 

 'The Groups of Steiner in Problems of Con- 

 tact,' by L. E. Dickson; 'Quaternion Space,' 

 by A. S. Hathaway; 'Reciprocal Systems of 

 Linear Differential Equations,' by E. J. 



Wilczynski; 'On the Invariants of Quadratic 

 Differential Forms,' by C. N. Haskins; 'The 

 Second Variation of a Definite Integral when 

 One End-point is Variable,' by G. A. Bliss; 

 'On the Nature and Use of the Functions 

 Employed in the Recognition of Quadratic 

 Residues,' by E. McClintock; 'A Determin- 

 ation of the Number of Real and Imaginary 

 Roots of the Hypergeometric Series,' by E. B. 

 Van Vleck; 'On the Projective Axioms of 

 Geometry,' by E. H. Moore. 



The December number (Vol. VIIL, No. 3) 

 of the Bulletin of the American Mathematical 

 Society contains the following articles: 'The 

 October Meeting of the American Mathe- 

 matical Society,' by Edward Kasner; 'Modern 

 Methods of Treating Dynamical Problems and 

 in Particular the Problem of Three Bodies,' 

 by E. W. Brown; 'The Hamburg Meeting of 

 the Deutsche Mathematiker-Vereinigung,' by 

 C. M. Mason; 'Some Curious Properties of 

 Conies Touching the Line Infinity at One of 

 the Circular Points,' by E. V. Huntington and 

 J. K. Whittemore; 'Pieard's Traite d' Analyse,' 

 by Professor Maxime Bocher; 'Errata,' 'Notes' 

 and 'New Publications.' The January num- 

 ber of the Bulletin contains: 'Note on Mr. 

 George Peirce's Approximate Construction for 

 T,' by Emile Lemoine; 'Concerning the Ellip- 

 tic f (g,, g^, «)-Functions as Coordinates in 

 a Line Complex, and Certain Related 

 Theorems,' by H. F. Stecker; 'On the Abelian 

 Groups, which are Conformal with Non- 

 Abelian Groups,' by G. A. Miller; 'The Infini- 

 tesimal Generators of Certain Parameter 

 Groups,' by S. E. Slocum; 'Shorter Notices'; 

 'Notes' and 'New Publications.' 



SOCIETIES AND ACADEMIES. 



CHEMICAL SOCIETY OF WASHINGTON. 



The 130th regular meeting was held Decem- 

 ber 12. The following program was presented : 



'The Solubility of Mixtures of Sodium 

 Chloride and Sodium Sulphate': A. Seidell. 



The author first gave a brief summary of 

 the status of solubility work in solutions other 

 than very dilute ones, and described in detail 

 the experimental difiiculties which have to be 

 met in this kind of work. He then presented 



