REVIEWS 
A. Badoureau | Ingénieur en chef des Mines, en retraite | causeries | 
. philosophiques | Paris Gauthier-Villars et Cie, Editeurs | Libraires du 
Bureau des Longitudes, de l’ecole polytechnique | 55, Quai des Grands- 
Augustins, 55 | Paper, pp. i-xx + 1-227 including errata. 
Vaccination | in the | Tropics | by | W. G. King, C. I. E., | Colonel I. M. S. 
(Retired). | [three lines of titles] | 1920. | London | Tropical 
Diseases Bureau, | 23, Endsleigh Gardens, N. W. I. | Boards, pp. i-vi 
+ 7-64, 5s. nett. 
Cocoa and | Chocolate | Their History | from Plantation to Consumer | by | 
Arthur W. Knapp | B. Se. (B’ham.), F. I. C., B. Se. (Lond.) | [three 
lines of titles] | London | Chapman and Hall, Ltd. | 1920 | Cloth, 
pp. i-xii + 1-210 including index. 
Optical Methods | in | control and research | laboratories | published by 
| Adam Hilger Ld. | 75A Camden Road, London, N. W. I. | England | 
pp. 30. Price ls. 6d. nett. Post free ls. 8d. Limp Cloth. 
Practical | Bacteriology, Blood Work | and | Animal Parasitology | includ- 
ing | Bacteriological Keys, Zodlogical Tables | and Explanatory 
Clinical Notes | by | E. R. Stitt, A. B., Ph. G., M. D., Se. D., LL. D. 
| [ten lines of titles] | Sixth Edition, Revised and Enlarged | with 
1 plate and 177 other illustrations containing 637 figures | Philadel- 
phia | P. Blakiston’s Son & Co. | 1012 Walnut Street | Cloth, pp. 
i-xi + 1-633 including index. 
The Development of | the Human Body | a manual | of human embryology | 
by | J. Playfair MeMurrich, A.M., Ph. D., LL.D. | [two lines of titles] 
| sixth edition, revised and enlarged | with two hundred and ninety 
illustrations several | of which are printed in colors | Philadelphia | 
P. Blakiston’s Son & Co. | 1012 Walnut Street | Cloth, pp. i-x + 
1-501 including index. Price, $3.25 net. 
FROM PREFACE TO THE SIXTH EDITION 
The increasing interest in human and mammalian embryology 
which has characterized the last few years has resulted in many 
additions to our knowledge of these branches of science, and 
has necessitated not a few corrections of ideas formerly held. 
In this sixth edition of this book, as in previous ones, the at- 
tempt has been made to incorporate the results of all important 
recent contributions upon the topics discussed, and at the same 
time, to avoid any considerable increase in the bulk of the volume. 
Several chapters have, therefore, been largely recast, and the 
subject matter has been thoroughly revised throughout, so that 
it is hoped that the book forms an accurate statement of our 
present knowledge of the development of the human body. 
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