1899] ANOTHER BOOK ON BACTERIA 453 



of the latter have scarcely even that claim — notably the drawing of the 

 bacillus of malignant oedema on page 174. 



We would, however, cordially recommend the book to all who desire to 

 gain an introduction to the vast science of bacteriology, and, more particularly, 

 to medical men who take any interest in natural processes outside, but 

 intimately related to, their immediate profession. I). A. Welsh. 



PRACTICAL CHEMISTRY. 



Laboratory Manual — Experiments to illustrate the Elementary Principles of 

 Chemistry. By H. W. Hillyer, Ph.D. New York : The Macmillan 

 Company; London: Macmillan and Company. Pp. vi. + 200(100 

 pages blank). Price 4s. net. 



The character of this book fully corresponds to its second title, and the 

 teacher of elementary students both in school and college will find it useful in 

 laboratory work. The book is divided into two parts, Part I. dealing with 

 preparation and properties of the elements and their compounds, whilst Part II. is 

 a guide to experiments in verification of quantitative laws. The experiments 

 are, on the whole, very well chosen, and the directions for their performance are 

 definite and accurate, illustrative diagrams being given where necessary. In 

 the last section, dealing with "Molecular weight by chemical means," scarcely 

 sufficient stress is laid on the fact that the basicity of the acids to which the 

 method is applicable must be determined beyond all doubt if a conclusive result 

 is to obtained. Students almost invariably ignore this essential condition, so 

 that the point ought to be specially emphasised. 



A FRENCH CONCHOLOGY. 



1. Lcs coquilles marines des cotes de France. By M. Locard. Large Svo, 



pp. 384, with 348 figures in the text. Paris : J. B. Bailliere et Fils, 

 1892. Price 18 francs. 



2. Les coquilles marines au large des cotes de France. By M. Locard. 



Large Svo, pp. 198. Paris: J. B. Bailliere, 1899. Price 6 francs. 



By the issue of the second of the volumes above mentioned, Mons. Locard 

 has completed the publication of his " Conchyliologie Frangaise." As stated 

 in the introduction to the first volume, his object was to give short but precise 

 descriptions of all the species of shells which are to be found in French waters, 

 so that the student and collector might be able to name his specimens without 

 having recourse to large and expensive works. 



The first volume, published in 1892, dealt Avith the shells of the French 

 coasts. A second, published in 1893, gave descriptions of those living in the 

 fresh and brackish waters of the country. A third, published in 1 894, described 

 the terrestrial shells ; and now the whole is completed by a volume on the 

 marine shells found outside the French coasts between the coralline zone and a 

 depth of about 2000 metres. 



We propose to notice the first and last of these volumes, which contain 

 descriptions of all the genera and species of shells that have been found in the 

 seas around France. Mons. Locard's work is essentially a conchological one. 

 The animals themselves are not described ; neither are questions of classification 

 or synonomy touched upon, the reader being referred for these points to his 

 previous work, the "Prodrome de Malacologie Franchise." But he defines the 

 families and genera which he has adopted, and gives a description of each 

 species of shell, with a mention of its geographical and bathymetrical distribu- 

 tion. Many of the species are illustrated by figures in the text, of which there 



