ATKINSON^ ON PHYSICS. 115 



of furnisliiug the more minute details of their organization. 

 Enlarged and accurate drawings of each species are given, and 

 the Avovk is abiuidantly supplied Avith tliose Avell-chosen and 

 beautifally executed tail-pieces, y.duch have made the Avorks 

 published Jjy A^an Voorst so interesting to the naturalist who 

 has a feeling for the picturesque in nature as well as a love 

 for the investigation of the special forms of animal and vege- 

 table life. From the portion already published, we believe 

 this "work will be a worthy companion of the series to Avhich 

 it belongs, and we hope its sale will induce the publisher to 

 go on Avith the series of volumes dedicated to the natural 

 history of the animals of the British Islands. 



Elementary Treatise on Pliysics, Expei'imejital and Applied. 

 By Professor A. Ganot. Translated by E. Atkinson, 

 Ph.D. Parts 1 to lY. London : Bailliere. 



It has often been a matter of regret to us that we had so 

 few elementary works on experimental philosophy. It is 

 true that a large number of our students can read Prench, 

 and in that language there are several works admirably 

 adapted as introductions to the inquiries of the experimental 

 ■ philosopher. The treatise of Professor Ganot is well know^n 

 in England ; and its acknoAvledged excellence giA'cs us great 

 pleasure in finding that it is undergoing the process of trans- 

 lation into English, as by this means it will find a much 

 wider circle of students in this country than it could do in 

 its native language. The four parts before us have not ex- 

 hausted the subject of heat, but the publisher promises that 

 it shall be completed in a post 8vo A'olume of 780 pages. It 

 will contain upAvards of 600 illustrations, and, when finished, 

 will constitute a work in which the student of every depart- 

 ment of experimental philosophy Avill have every reason to be 

 satisfied. We need not point out here how important it is 

 for those who use the microscope to understand the law-s of 

 light. From the want of an elementary knowledge of this 

 subject many absurd mistakes are committed by tliose who 

 use the microscope, and our treatises on this instrument 

 cannot supply the Avant of a general view of the entire sub- 

 ject. The Avork is exceedingly Avell printed, and the wood- 

 cuts executed with great care, so that we can cordially re- 

 commend this English edition of Professor Ganot^s Avork. 

 As a proof of the popularity of Ganot's book in France, we 

 ought to add that the translation is made from the ninth 

 French edition. 



