Review. 61 



ever, are minor faults which are readily corrected by any 

 competent teacher, and the author is certainly to he con- 

 gratulated upon having reduced errors of all kinds to a 

 minimum. Our knowledge of histology and physiology is 

 now advancing at such a rapid rate, that many errors of 

 omission, and possibly in some cases of facts also, are almost 

 inseparable from a work of this kind. The time which 

 elapses between the reception of the manuscript by the 

 publisher and of the book by the public, is sufficient to 

 make many statements old, and often to upset previous 

 views. Bearing this in mind, the book is fully up to the 

 times, and we can commend it as destined to meet, in a most 



acceptable manner, a long-felt want. 



D. P. P. 



Miscellaneous Notes. 



Microscopical Society of Montreal — At the Annual Meeting 

 held November 23, the following officers were elected : Rev. Dean 

 Carmichael, President ; J. H. Burland, Secretary ; H. A. H olden, 

 Treasurer. Dr. G. P. Girdwood exhibited sections of Diseased Po- 

 tatoes, which appeared to have been connected with a recent devel- 

 opment of fowl-cholera. Nothing could be determined in the spec- 

 imens beyond the ordinary changes and putrefactive organisms 

 which usually accompany decomposition. Prof. Penhallow called 

 the attention of the Society to a simple device for lifting and plac- 

 ing Cover Glasses. An ordinary penholder having an unsplit fer- 

 rule is employed, the latter is cut off to such a length as to leave a 

 tube about -]-inch long, beyond the end of the wooden handle 

 The tube is filled with wax until the latter, on cooling, forms a well" 

 rounded end projecting beyond the metal. The end of the wax is cut 

 down to a flat surface of about g in. diameter. The handle is now 

 complete and ready for use. To employ it, press the wax gently 

 against the centre of the cover, when the latter may be lifted with- 

 out trouble and placed over the mount in any direction of contact 

 desired. The use of a needle, or slight lateral pressure on the 

 handle, at once detaches it from the cover, leaving only a minute 

 trace of wax behind, but this may be easily removed after the ring 

 has hardened and the final cleaning is given. 



Erosion of Glass.— Before a meeting of the Royal Microscopical 

 Society, Dr. W. M. Ord described certain experiments to determine 

 the cause of erosion, Avhen surfaces of glass are exposed to the joint 



