322 THE NORTHERN MICROSCOPIST. 
The illustrations are kept to the high-class standard, with which 
they were commenced, and the preparations accompanying the 
letterpress show very completely the details intended to be exhibited. 
In several instances perhaps slightly thicker sections might have 
been given with advantage, but it must be admitted that @// the 
minutie cannot be expected in one single mounted slide. 
The methods of preparation of the lung on pp. 159 and 160 
will be read with interest by the student of histology, and also 
those relating to the kidney on pp. 135, 136. 
MicroscopicaL Mountinc Ciasses.—The opening meeting of 
the session of the Manchester Society was held on Wednesday 
evening, the 11th imst., Mr. J. L. W. Miles in the chair. It was 
extremely well attended, rendering necessary the formation of a 
junior and a senior division, and showed that the value of practical 
exposition is becoming more and more appreciated by the general 
members of the Society. 
As illustrating the scope of this section, the junior members, as 
in previous sessions, will proceed with cell making for dry and 
fluid mounts ; mounting in balsam and glycerine jelly, ringing and 
finishing off ; while the senior members are promised among others, 
demonstrations by the following gentlemen :— 
Preparation and section cutting of vegetable tissues, Mr. R. L. 
Mestayer ; Animal tissues and mounting of insects in pure balsam, 
without pressure, Mr. H. C. Chadwick, F.R.M.S. ; Extraction of 
palates and insect dissections, Mr. W. Chaffers; Dissection of the 
oyster, Mr. E. P. Quin; Fluid mounts, Mr. J. L. W. Miles; The 
use of the Microtome, Mr. A. Hay; Double staining, Mr. A. J. 
Doherty, and Microcrystallization, Mr. E. Ward, F.R.M.S. 
Mr. W. Stanley, in the junior division, proceeded to illustrate by 
means of brown cement and brass rings, the first processes of cell 
making for dry and fluid mounts. In the senior division the 
demonstrator was Mr, J. L. W. Miles, who cut sections of the 
potatoe for mounting as a dry and opaque object, emptying a 
portion of the cells of their starch contents, and thus exhibiting 
clearly the cell structure ; the remaining cells showing the starch 
in situ. 
_ Of the many methods of mounting sections of the potatoe, this 
is perhaps the most satisfactory, whether we regard it as an object 
of interest and beauty, or as a slide for botanical instruction. Mr, 
Miles also mounted starch in balsam for the Polariscope. 
CoLourinG InrusoriA.—M. A. Certes, in a recent number of 
Comptes Rendus, has an interesting article upon a method of 
colouring infusoria during life. With the exception of the Opalines 
and the Haptophrya, all the ciliated infusoria can ingest or take in 


