672 



SCIENCE. 



[N. S. Vol. XX. No. 516. 



previously published and discussed in such a 

 connected form, and are alone well worth the 

 price of the book. Not less interesting and 

 valuable are the portions devoted to antifoul- 

 ing paints, carriage and house painting and 

 furniture varnishing. 



Being a treatise on the industrial and 

 artistic technology one scarcely expects to find 

 much chemical information; there are, how- 

 ever, excellent chapters on the oils, particu- 

 larly one on linseed oil by Dr. Mcllhiney. It 

 would have materially aided the chemist to 

 have found an equally good and complete de- 

 scription of the gums used in varnish manu- 

 facture. 



Throughout the entire work, one can not 

 help being impressed with the wide practical 

 experience of the author in the technology of 

 paints and varnishes, and particularly with 

 their applications. 



The work should be in the hands of the 

 architect, whether engaged in the erection of 

 sky-scrapers or summer houses, of the civil 

 engineer, having to do either with bridge or 

 water works construction, of the naval con- 

 structor, and in fact of any one concerned 

 with the preservation of wood or metal. 



A. H. Gill. 



GAUPP'S ANATOMY OF'THE FROG.^ 



In preceding numbers of Science (Vol. 

 VII., p. 463; X., p. 451; XV., p. 100) the 

 earlier parts of this monumental work on the 

 structure of the frog have received notice. 

 The present part completes the whole, making 

 a total of 1,Y38 pages, aside from preface, etc., 

 entirely devoted to this one form. No other 

 vertebrate, man excepted, has ever had such 

 exhaustive treatment. 



This concluding portion, 521 pages in all, is 

 devoted solely to integument and sense organs, 

 all treated in the same careful manner as the 

 other systems, but, as would be expected, mi- 

 croscopic detail is emphasized here as in no 

 other parts. Not only do We have a general 



* A. Ecker's und R. Wiedersheim's ' Anatomie 

 des Frosches auf Grund eigener Untersuehungen 

 duichaiis ' neu bearbeitet von Dr. Ernst Gaupp. 

 Illte Abtheihmg, lite Hillfte, pp. 441-961 + xi. 

 Braunschweig, 1904. 



account of the structure of the skin and its 

 glands like that given in the first edition of 

 the work (familiar in most laboratories in 

 Hassal's translation), but we are given a good 

 summary of the known facts, structural and 

 physiological, of the color changes and details 

 of the breeding-season changes in specific 

 regions of the skin. 



In treating of the sense organs each section 

 is followed by a resume of the development of 

 each and an account of its functions. Thus 

 in connection with the nose we have an ac- 

 count of the course of the air in the different 

 parts of the nasal cavity, and the evidence to 

 show that the frog is an ' air smeller ' even 

 when submerged. It is especially in the sec- 

 tion pertaining to the ear that the largest 

 proportion of new facts are given, since Dr. 

 Gaupp has made certain parts of the otic 

 region peculiarly its own. 



In conclusion, we may say that the work is 

 one which must be in every laboratory, and 

 while we can hardly expect the whole to be 

 translated we wish that at least certain por- 

 tions, like that on the central nervous system, 

 were more accessible to our students. Con- 

 gratulations must be extended to the author 

 on the completion of such a vast amount of 



work. J. S. KlNGSLEY. 



SCIENTIFIC JOURNALS AND ARTICLES. 

 The opening (October) number of Volume 

 11, of the Bulletin of the American Mathe- 

 matical Society contains the following ar- 

 ticles : ' On Developable and Tubular Sur- 

 faces having Spherical Lines of Curvature,' 

 by Professor Virgil Snyder ; ' Addition to a 

 Theorem due to Frobenius,' by Professor G. 

 A. Miller; 'On Self -Dual Scrolls,' by Pro- 

 fessor E. J. Wilczynski ; ' The Opportunities 

 for Mathematical Study in Italy,' by Dr. J. 

 L. Coolidge ; ' Vector Analysis ' (Review of 

 Henrici and Turner's Vectors and Rotors, of 

 Kelland and Tait's (Knott) Introduction to 

 Quaternions and of Fischer's VectordifFeren- 

 tiation und Vectorintegration), by Dr. E. B. 

 Wilson ; ' The Mathematics of Insurance ' 

 (Review of Loewy's Versicherungsmathe- 

 matik), by Dr. Saul Epsteen; Shorter Notices 

 (Seliwanoff's ' Lehrbuch der Differenzenrech- 



