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. D. A. WELSH. 
PRACTICAL CHEMISTRY. 
Laboratory Manual—Experiments to illustrate the Elementary Principles of 
Chemistry. By H. W. Hittyrr, 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 IT. 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. Les coquilles marines des cétes de France. By M. Locard. Large 8vo, 
pp. 384, with 348 figures in the text. Paris: J. B. Bailliére et Fils, 
1892. Price 18 francs. 
2. Les coquilles marines au large des cétes de France. By M. Locard. 
Large 8vo, pp. 198. Paris: J. B. Bailliére, 1899. Price 6 francs. 
By the issue of the second of the volumes above mentioned, Mons. Locard 
has completed the publication of his ‘‘ Conchyliologie Francaise.” 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 with 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 1894, 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 Franeaise.” 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 
