REVIEWS. 39 



evidences of more careful research. The papers in it show a marked im- 

 provement over some of even the more recently published proceedings of 

 the same society, when issued in a separate form ; and we trust that the 

 improvement may be regarded as a proof of increased vitality in a body to 

 whose members British natural history has been so long and so deeply 

 indebted. The plates with which these volumes are illustrated are highly 

 finished ; they are executed by Mr. Tuifen West, from whose burin the 

 very beautiful plates which illustrated Smith's " Monograph of the Dia- 

 tomaceae" have also proceeded. 



The two last books on our present list are devoted to special branches 

 of microscopical research the one, to the use of the microscope in clinical 

 medicine, by Dr. Lionel Beale; the other, to its application in medical 

 anatomy and physiology, by Dr. Hermann Schacht. The former of these 

 (" The Microscope, in its Application to Clinical Medicine") is based upon 

 a course of lectures delivered in the spring of 1853. To the notes then 

 prepared, considerable additions have been subsequently made, forming the 

 present very complete and useful manual. The importance of observing with 

 attention those structural changes which are the result of disease is every 

 day more widely recognised ; and we fully agree with its author, that the 

 medical man will find in these investigations ample employment, and may 

 thus contribute to the advancement of the true interests of his profession. 



A work devoted to such a line of investigation, at first sight may appear 

 to have but little charms for the naturalist ; still, we have perused it with 

 pleasure and profit. It is such a manual as we would gladly see more of 

 suited to the wants of the student by its great simplicity, while, from its 

 ability and research, the more experienced practitioner will gladly turn to 

 its pages as a welcome guide. It is embellished with some 230 woodcuts, 

 ably executed by Mr. Davies ; and, what we conceive to be most valuable 

 in such a work, the student is told by what power they were examined by 

 Dr. Beale, and he is furnished with a scale by which he can test the accu- 

 racy of his own observations. 



Among the topics most interesting to the naturalist are, notices of several 

 Entozoa and some parasitic vegetable structures, as Pencilium glaucum, 

 Achcerion Schcenleinii, Tricophyton tonsurans ; and, among the parasitic 

 algae, Sarcina ventriculi and Leptothrix buccalis. 



As this work may, perhaps, not be consulted by some of our non-profes- 

 sional readers, we briefly extract an account of these productions, and 

 illustrate our quotations with woodcuts, for the liberal use of which we are 

 indebted to its publisher. Among the Entozoa noticed, are the Genus 

 Echinococcus, which has been recently shown to be the larvae of Taenia. 



