July 20, 1900.] 



SCIENCE. 



113 



so that it may be distributed to those most en- 

 titled to it, and placed on sale like other gov- 

 ernment publications. 



E. W. Allen. 



' Erratum ' ; ' Notes ' ; ' New Publications ' ; 

 ' Ninth annual list of papers read before the 

 Society and subsequently published,' 'Index.' 



SCIENTIFIC JOURNALS AND ARTICLES. 



The American Journal of Science for July 

 contains the following articles : 



'Energy of the Cathode Eays,' by W. G. Cady. 



' Volcanic Rocks from Temiscouata Lake, ' Quebec, 

 by H. E. Gregory. 



' Interpretation of Mineral Analysis : a Criticism 

 of recent Articles on the Constitution of Tourmaline, ' 

 by S. L. Penfield. 



' Studies in the Cyperaceae, No. XIII,' by T. Holm. 



' Titration of Mercury by Sodium Thiosulphate, ' 

 by J. T. Norton, Jr. 



' Selenium Interference Rings, ' by A. C. Longden. 



' Carboniferous Bowlders from India, ' by B. K. 

 Emerson. 



' New Bivalve from the Connecticut River Trias,' 

 by B. K. Emerson. 



' Statement of Rock Analyses, ' by H. S. Washing- 

 ton. 



' String Alternator,' by K. Honda and S. Shimizu. 



' Action of Light on Maguetism,' by J. H. Hart. 



The June number of the Bulletin of the 

 American Mathematical Society contains the fol- 

 lowing articles : ' Report of the April meeting 

 of the Society, ' by the Secretary ; ' Report of the 

 April meeting of the Chicago Section,' by T. F. 

 Holgate, Secretary of the Section ; ' On the 

 history of the extensions of the calculus, ' by J- 

 G. Hagen ; Burnside's 'Theory of groups,' by 

 G. A. Miller ; Shorter notices : D'Ocagne's 

 'Treatise on nomography,' by F. Morley ; Bar- 

 ton's 'Theory of equations,' by J. Maclay ; 

 Rice's ' Theory and practice of interpolation,' 

 by E. W. Brown ; Braummiihl's ' History of 

 trigonometry,' and Boyer's 'History of mathe- 

 matics,' by F. Cajori; and Frischauf's 'Series 

 in circular and spherical functions,' by W. B. 

 Ford ; ' Notes '; ' New Publications.' 



The July number, concluding Vol. VI. of the 

 Bulletin, contains : ' Some remarks on tetra- 

 hedral geometry,' by H. E. Timerding ; ' On 

 singular transformations in real projective 

 groups,' by H. B. Newson ; ' On groups of order 

 8 !/2, by Ida M. Schottenfels ; Lobachevsky's 

 Geometry ' (second paper), by F. S. Woods ; 

 ' Burkhart's Elliptic functions,' by J. Pierpont; 



DISCUSSION AND CORRESPONDENCE. 



THE INTERNATIONAL CATALOGUE OF SCIENTIFIC 

 LITERATURE. 



To THE Editor of Science : The following 

 criticism has been sent to me of the last sched- 

 ule published by the Royal Society for the In- 

 ternational Catalogue : 



"Take for example, paleontology, the intro- 

 duction states that the zoological subdivisions 

 are identical with those of the zoological scheme, 

 but so hasty is the compilation that the old 

 scheme of three years ago has been republished 

 quite forgetful of the fact that it was long since 

 given up and replaced by a totally different 

 one. Had one ever classified titles by this 

 scheme, the complete want of accord would 

 have at once appeared. On p. 14 of the zo- 

 ological scheme is a half page of misprints, 

 which could not have been overlooked had the 

 scheme served for experiments, ' Fauna and 

 Flora ' stands as a division of human anatomy, 

 evidently through some carelessness of copy- 

 ing ; topics are wanting in abundance and the 

 same topic recurs 3 or even 4 times. Indeed in 

 spite of all the good counsel given and the two 

 years that have been taken, these last schemes 

 simply swarm with errors, from fundamental 

 ones to mere careless misprints * * *." 



It hardly seems possible that this schedule, 

 so regardless of the best principles of biblio- 

 graphical work, and so illogical in its classifica- 

 tion can receive the general support which is 

 necessary to make it a financial success. We 

 all welcome the idea of international co-opera- 

 tion as the only means out of the impasse of 

 over crowded literature, but before we can com- 

 bine we must have put before us a scheme 

 which is practicable. 



Henry F. Osborn. 



the callosities upon horses' legs. 

 To the Editor of Science : I shall feel 

 very much obliged to any of your readers who 

 will furnish me with any hypotheses concerning 

 the origin of the callosities upon the legs of 

 horses and mules, and upon the fore-legs of 



