ZOOLOGY AND BOTANY, MICROSCOPY. ETC. 113 



Nature through Microscope and Camera.* — This admirable intro- 

 duction to the marvels of microscopy and photomicrography is the work 

 of R. Kerr and A. E. Smith, the former contributing the descriptive 

 portion, and the latter being responsible for the illustrations and the 

 chapter on photomicrography. There are two Introductions, one by 

 Professor Sims Woodhead, the other by the author. In the latter 

 Mr. Kerr wisely remarks, that the more our young men take up intel- 

 lectual pastimes the better it will be for the nation. After discussing 

 the illustrations and high possibilities with the Microscope, and giving 

 practical hints on photomicrography, the rest of the volume is devoted 

 to describing and illustrating Eadiolaria, Foraminif era, Insecta, Diatoms, 

 botanical specimens ; human hair, skin, bone, muscle, lung, and blood ; 

 mites, bacteria, hooklets of tapeworm, and silk. 



Most of the illustrations are extremely good, but exception must be 

 taken to Plates 47 and 51, which do not fairly represent the human 

 skin or the blood-corpuscles. The former gives only a rough idea of 

 structure, and the latter shows an early stage of degeneration. Notwith- 

 standing such trivial blemishes, the work must be described as being 

 admirable in respect of general get-up, description, and illustration. 



Bacteriological Technique.! — " Bacteria in Relation to Plant 

 Diseases," by Erwin F. Smith, is a notable example of how thoroughly 

 the American Government appreciates the value of scientific work. 



The first volume, which deals with methods of work and general 

 literature of Bacteriology, exclusive of plant diseases, is one of the most 

 complete and practical treatises that have been published on bacterio- 

 logical technique. It would be beyond the limits of our space to enu- 

 merate even the outline of methods of work as given in this volume. It 

 must suffice to say that every aspect of a bacteriological examination 

 has been considered, and every phase of the routine of laboratory work 

 mapped out in such a way that almost a neophyte could, with the aid of 

 this text-book, conduct a bacteriological inquiry with hope of success. 



The volume is copiously illustrated, and the bibliography extensive. 



Methods in Plant Histology.} — This work, the first edition of 

 which was noticed in this Journal, 1001, p. 604, has been much im- 

 proved and augmented by the author, C. J. Chamberlain. More atten- 

 tion has been given to collecting material, and the chapters on the 

 paraffin and Venetian turpentine methods have been revised and much 

 enlarged. Other new chapters deal with micro-chernical tests, freehand 

 sections, special methods, and the use of the Microscope. This volume, 

 which is half as large again as its predecessor, should be highly esteemed 

 by botanists. 



Drbyeb, G., & Jex-Blake, A. J. — On the Agglutination of Bacteria. 



Mem. Acad. Boy. Sci. et Let. Danemark, i. (1905) pp. 219-60. 

 Richter, O. — Die Fortschritte der botanischen Mikrocliemie seit Zimmermanna 

 " Botanischer Hikrotechnik." 



[An exhaustive review of the progress in vegetable microchemical technique, 

 to which is appended a very copious bibliography.] 



Zeitschr. wiss. Mikrosk., xxii. (1905) pp. 369-411. 



* London : Religious Tract Society, 1905, 194 pp., 65 pis. 



t Carnegie Institution, Washington, D.C., U.S.A., Publication No. 27 (1905) 

 4to, 285 pp., 31 pis. and 146 figs.). 



% Univ. of Chicago Press, 2nd ed., 1905, x. and 262 pp., 87 figs. 



Feb. 21st, 1906 I 



