NOTICES OF MEETINGS. 33 

Palladium, and by the Oxalate of Chromium, and Potash and 
‘others. Other crystals possess a character which by some is termed 
Dichroism, but which is, I think, most properly designated Fluores- 
‘cence, and is well shewn in the Platino-cyanides, more particularly 
those of Magnesium and Yttrium. 
Another peculiarity of some crystals was in 1837 designated by 
Fox Talbot as Analytic, that is, they have the power of analysing 
polarized light like a Tourmaline, and when examined on the 
Microscope stage, do not need the analyser above the objective. 
This power is possessed by the Platino-cyanides, Boracic Acid, 
Murexide, Hippuric Acid, Nitrate of Potash, Iodo-sulphate of 
‘Quinine, and many others. 
The scientific cause of these powers of Dichroism, Analysis, and 
Fluorescene, as well as Polarization, I pass entirely by, leaving 
them to be dealt with by others much more fitted for the work. 
And in concluding, I would ask any who are tempted to take up 
this subject either in a scientific or di/etfante manner, to jot down 
for their own or others’ benefit anything which arises from their 
experiment, as it is from such notes as those, made at my work- 
table, that I have ventured to prepare this paper. 

NOTICES OF MEETINGS. 
BOWDON LITERARY AND SCIENTIFIC CLUB.—The current 
meeting of this Club, held on Monday, December 19th, was devoted to Micros- 
copy, Rev. A. Mackennal, B.A., F.R.M.S., in the chair. A short paper was 
read by Mr. G. J. Johnson on Jusectivorous Plants. The chairman exhibited 
some highly interesting specimens of Deep Sea Dredgings, with sections of 
Chalk. The Rev. A. L. Watherston, M.A., F.R.A.S., showed crystallizations 
in process ; Mr. Jesse Haworth some beautifully-mounted Peristomes of Moss, 
with five specimens of Wavicula, Isthmia nervosa, &c.; Mr. G. H. Fryer 
illustrations of pure and adulterated foods; Mr. T. D. Hall, M.A., Hydra 
viridis, in process of germination, and Volvox globator. The protean changes 
of Hydra excited much interest. At one moment it appeared as if the comple- 
tion and detachment of a new individual would be effected under the observer’s 
eye: then again in an instant the ground apparently gained was lost, and things 
were once more 77 statu quo. ‘This was the first microscopical meeting ; but 
‘the interest excited, promises much for the future development of this section of 
the operations of the Club. 
LIVERPOOL MICROSCOPICAL SOCIETY.—Sorr£E oF ASSOCIATED 
SOCIETIES.—The Fifth Annual Associated Sozvée of the Liverpool Literary, 
Scientific, and Art Societies was held in St. George’s Hall on Wednesday 
evening, Dec. 21st, 1881, when, as on previous occasions, the whole of the 
magnificent suite of rooms, in addition to the large hall, were thrown open. 
Every part of the hall was crowded with a brilliant assemblage, and it was 
estimated that not less than 3,500 persons were present. 


