May 26, 1899.1 



SCIENCE. 



751 



Coast,' Douglas H. Campbell touches on the 

 botauy of that region. W. D. Matthew con- 

 siders the question: 'Is the White River Tertiary 

 an ^Eolian Formation, ' deciding it in the affirma- 

 tive. F. H. Herrick describes several cases of 

 'Ovum inOvo,' and after classifying the vari- 

 ous methods in which such abnormalities occur 

 presents theories which account for them. The 

 concluding paper by T. D. A. Cockerel! is ' On 

 the Habits and Structure of the Coccid Genus 

 Margarodes.' Among the editorials is one on 

 ' The Gypsy Moth and Economic Entomology,' 

 in which the ground is taken that it is not worth 

 while to continue the present extravagant 

 policy. The number is unusually full of brief 

 and good reviews of recent scientific literature. 

 The March number of the Bulletin of the 

 American Mathematical Society contains : ' On 

 Singular Points of Linear Differential Equations 

 with Keal Coefficients,' by Professor Masime 

 Bocher ; ' The Hessian of the Cubic Surface,' by 

 Dr. J. I. Hutchinson ; ' On the Simple Iso- 

 morphisms of a Hamiltonian Group to Itself,' 

 by Dr. G. A. Miller; 'Galois's Collected 

 Works,' by Professor James Pierpont ; ' Three 

 Memoirs on Geometry,' by Professor Edgar 

 OdellLovett; ' Stahl's Abeliau Functions,' by 

 Dr. Virgil Snyder ; ' Calculus of Finite DifTer- 

 ences,' by Dr. D. A. Murray; 'Notes' and 

 ' New Publications.' The April number of the 

 Bulletin contains an account of the February 

 meeting of the American Mathematical Society, 

 by Professor F. N. Cole ; ' Determinants of 

 Quaternions,' by Professor James Mills Pierce ; 

 ' The Largest Linear Homogeneous Group with 

 an Invariant Pfafflan,' by Dr. L. E. Dickson ; 

 'Asymptotic Lines on Ruled Surfaces having 

 Two Rectilinear Directrices,' by Dr. Virgil 

 Snyder; 'Willson's Graphics,' by. Dr. J. B. 

 Chittenden; 'Pascal's Repertorium of Higher 

 Mathematics,' 'D'Ocagne's Descriptive and 

 Infinitesimal Geometry,' by Professor Edgar 

 Odell Lovett ; ' Sophus Lie,' translation of Pro- 

 fessor Gaston Darboux's notice ; 'Notes ' and 

 'New Publications.' The May number of the 

 Bulletin contains an account of the April meet- 

 ing of the Chicago Section of the Society, by 

 Professor Thomas F. Holgate ; ' An Elementary 

 Proof that Bessel's Functions of the Zeroth 

 Order have an Infinite Number of Real Roots,' 



by Professor Maxime Bocher ; ' A Generaliza- 

 tion of Appell's Factorial Functions,' by Dr. E, 

 J. Wilczynski ; ' On the Arithmetization of 

 Mathematics,' by Professor James Pierpont ;, 

 ' Two Books on the Tides,' by Professor Ernest 

 W. Brown ; ' Notes' and ' New Publications.' 



The Annals of Mathematics will henceforward 

 be published quarterly, beginning with the num- 

 ber issued on October 1st, by the department of 

 mathematics of Harvard University. Professor 

 Ormond Stone, of the University of Virginia, 

 who founded and for many years supported the 

 journal, has consented to act as a member of 

 the board of editors in cooperation with Pro- 

 fessor H. S. White, of Northwestern University, 

 and Professors Byerly, Osgood and Bocher, of 

 Harvard University. The editors state that 

 their object is to conduct the journal so that it 

 may appeal not merely to the highly trained 

 specialist, but to the general mathematical 

 public of America from students of mathematics 

 in the graduate schools of our universities up- 

 ward. Short research articles will be welcomed, 

 but highly technical articles will be avoided. 

 Articles containing little or no absolutely new 

 matter, but giving a clear presentation of some 

 important but not readily accessible field of 

 mathematics, or a more thorough presentation 

 of some subject which is generally treated in an 

 unsatisfactory manner, are especially desired. 



SOCIETIES AND ACADEMIES. 

 CHEMICAL SOCIETY OF WASHINGTON. 



The regular meeting was held on April 13,. 

 1899. 



The first paper of the evening was read by 

 Mr. J. K. Haywood, and was entitled ' Some 

 Boiling-Point Curves.' The results obtained 

 have led to the following conclusions : 



I. All mixtures of the following pairs of 

 liquids boil at temperatures between the boil- 

 ing points of the constituents : alcohol-water,, 

 alcohol-ether, chloroform-carbon tetra-chloride, 

 acetone-water and acetone-ether. 



II. A solution containing 17.5 '/o alcohol in 

 carbon tetra-chloride distills without change at 

 65.5° approximately, under a pressure of 768.4 

 mm. of mercury. 



III. A solution containing 12.5 % methyl al- 



