NEW BOOKS, WITH SIIOKT NOTICES. 17 



Beale's Prussian blue fluid, but be suggests some modifications whicli 

 do not ajipear to us of any importance. After going very fully into 

 tbe subject of tbe different forms of injection, tbe various fluids, the 

 transjjarent and opaque, be enters on tbe subject of pursuing injection 

 upon tbe living animal. He gives a section to tbe metbod, and 

 describes fully tbe process employed by bimself and M. Onimus. 

 Then follow the precautions to be taken in injection, the differences 

 between injection and infiltration, the rupture of j)arts during the 

 operation, the injection of veins, partial injections, and last of all, of 

 physiological injections. 



Then comes the chapter on microscopes and ajiparatus. This is 

 not so good as we should have expected. It is confined to French 

 and English microscopes, and it figures none of the latter save a 

 couple of the instruments of Koss. Tbe chief illustrations it contains 

 of advantage to English masters are those of the dissecting lens of 

 Lacaze-Duthiers ; the new great microscope of Nachet, which is a pecu- 

 liar instrument ; and a prismatic eye-jnece, which reverses tbe position 

 of the rays, and makes an object appear in its ordinary position. Tbe 

 rest of the chapter deals with the various methods of correction, and 

 it gives a figure of the instrument for measm'ing tbe angle of aperture 

 of objectives ; it deals well and fully with its subject. It is followed 

 by a chapter detailing at considerable length the various chemical agents 

 employed in microscopical research. Then follow various chapters de- 

 scribing the drying of tissues, the preparation of microscopic objects, 

 microscopic dissection, thin sections of hard tissues, the instruments 

 employed in preparing the sections, the method of illumination, fol- 

 lowed by a discussion upon tbe different modes of lighting up an 

 object, and dealing tolerably fully with the mathematical bearings of 

 the subject ; and lastly there is a very short chapter which leaves 

 unnoticed much of the work done on the subject of photographing 

 microscopic objects, &c., Sec. 



Finally there comes the remaining half of the volume which is 

 devoted to the methods of preparing specimens of the various tissues 

 already named, for microscopic piu-poses. This is by far tbe most 

 valuable and likewise the most novel part of the work. Of course the 

 reader will find much in it which he has already learned from Dr. Car- 

 penter, and Dr. Beale, but be will also find abundance of novel matter 

 which we will venture to say he cannot discover elsewhere. Thus 

 the book is on the whole a useful and valuable addition to our micro- 

 scopic literatui'e. It has only one fault, and that is the paucity of 

 its illustrations. Dr. Carpenter's, which is really a smaller work, 

 contains very much more than double the number of illustrations 

 which M. Eobin has thought necessary, thus rendering it most valu- 

 able to the student. We trust that M. Robin will see to this in next 

 edition, and we hope that that period may soon come round, for the 

 volume is really a most valuable addition to our microscopic 

 literature. 



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