116 KEVIEWS. 



Die Naturlichen Pflanzenfamilien. By A. Engler and 

 K. Prantl. Parts io6, 7, 8. (London : Williams and Norgate. Leipzig : 

 Wilhelm Engelmann. 1894.) 



We have here the completion of the third and parts of the fourth volume. 

 The families treated of are Cactacese by K. Schumann (concluded); Geissolo- 

 maceas, Penacacese, Oliniaceae, Thymelacacese, and Ekoagnacese by E. Gilg ; 

 and Borraginaceae by M. Gurke ; Gesneriacese (concluded) ; and Columelli- 

 acese by Karl Fritsch ; and Bignoniacese by K. Schumann. There are 49 fine 

 illustrations, composed of 369 figures. 



Half-Hours with the Microscope. By Edwin Lankaster, 



M.D. Fscap. 8vo, pp. 130. (London: W. H. Allen. 1894.) 



The nineteenth edition of this useful little book is now before us. Con- 

 sidering the present advanced state of Microscopy we should have liked to have 

 seen an entirely new written and up-to-date book, but the volume before us has 

 the appearance of having been printed from the stereo-plates of a former edition. 

 There are one coloured and eight plain plates, besides other illustrations. 



Directions for Laboratory Work in Bacteriology. By 



Frederick G. Novy, Sc.D., M.D. 8vo, pp. 209. (Ann Arbor, Mich., U.S.A. : 

 George Wahr. 1894.) 



The subject matter of this book has been arranged with reference to pro- 

 gressive work in the laboratory, and is intended to cover a course of daily 

 afternoon work for twelve weeks. No illustrations are given, but blank pages 

 are inserted that the student may add them. Very full and valuable formulae 

 and instructions are given. We consider the book a most useful one. 



Practical Lessons in Elementary Biology for Junior 



Students. By Peyton T. B. Beale, F.R.C.S., etc. P. 8vo, pp. vii.— 136. 

 (London : J. and A. Churchill. 1894.) 



In the useful lessons which have been used with much success in the biolog- 

 ical section of King's College, the author treats in a practical manner those 

 points in the structure and life history of some organisms which are of great 

 importance, and in which the student frequently experiences a difficulty. 



In each lesson the author indicates what may be seen and how important 

 parts may be practically demonstrated. 



Outlines of Biology. By P. Chalmers Mitchell, M.A., 

 F.G.S.,etc. Post 8vo, pp. XV. — 297. (London : Methuen and Co. 1894.) 6/- 



This book is arranged in accordance with the syllabus of the Royal College 

 of Physicians and Surgeons for the guidance of candidates preparing for exam- 

 ination in Elementary Biology. It it divided into 18 chapters, commencing 

 with Protoplasm and the Building up of Protoplasm to The Dog Fish and the 

 Frog ; the last chapter being on Embryology. There are 74 illustrations in the 

 text. 



Practical Physiology of Plants. By Francis Darwin, 

 M.A., F.R.S., and E. Hamilton Acton, M.A. Cr. 8vo, pp xxviii. — 321. 

 (Cambridge and London : The University Press. 1894.) Price 6/-. 



Part I. of the book before us deals with general physiology, and Part II. 

 treats in a special manner of certain departments of physiology, viz. — Che- 

 mistry and Metabolism, and presupposes a greater amount of knowledge on 

 the part of the student. 



