138 
PROCEEDINGS OF SOCIETIES. 
[Monthly Microscopical 
Journal, Feb. 1, 1869. 
The objects exhibited were divided into sections and were illustrated 
as follows : — 
A ^ J -m • 1 i T. Inman, M.D., T. S. Walker, 
Anatomy and Physiology | ^^^^ ^^^^ ^^^^^^^ M.^CS. 
Vegetable Tissues i?ev. W. Banister, B.A. 
Vegetable Circulation G. F. Chantrell. 
T • • /M • . ^ J. Abraham, T, G. Moore. Cor. 
Living Objects | Mem. Z.8. 
Diatomace£e Arthur C. Cole, Lewis Hughes. 
Eaw Fabrics W. Carter, M.B., B. Sc., LL.D. 
Adulterations in Exciseable Articles , . R. Connor. 
Seaweeds S. L. Oregson. 
Insect Dissections W. J. Baker, J. Henderson. 
Foraminifera and Polycystina W. H. Weightman. 
Micro-Chemistry C. F. Salt, E. Davis, F.C.S. 
Mr. Cole exhibited MoUer's Diatom Tpe Slide, which had been 
kindly lent for the occasion by Mr. Curteis, and a slide of exquisitely 
arranged Diatoms prepared by himself. 
Messrs. E. Davis and C. F. Salt exhibited slides of sulphate of 
copper, spirally crystallized at different temperatures. 
Mr. J. Abraham exhibited Melicerta ringens, Floscularia ornata, 
Fredericella sultana. 
Mr. J. T. Moore exhibited specimens of Vorticella and Hydra 
from the aquaria of the Free Museum, and some Nudibranchiate spawn 
from the Mersey. 
Dr. Inman exhibited the Sclerotic of a bird's eye and a longi- 
tudinal section of the eye of an insect. 
Mr. Walker exhibited a transparent injection of the iris and 
ciliary processes. 
Bbighton and Sussex Natural History Society. 
January 14. 
A paper " On Flint " was read by Mr. T. W. Wonfor, Hon. Sec. 
After describing Flint and discussing the various theories respect- 
ing its origin, Mr. Wonfor pointed out the utility of the microscope 
in geological research, in fact, that a new phase of geological inquiry 
had been opened out by the examination of thin sections of rocks. 
Not only had it been shown beyond doubt that flint had been formed 
by the infiltration or deposit of soluble silicates or organisms, such as 
sponges, corals, &c. ; but thin sections of flint, under the microscope, 
revealed the presence of foraminiferee, sponge spicules, Xanthidia, 
believed by some sporangia of Desmidige, &c. 
Infiltration and deposit of silex held in solution was still going 
on, as seen in the Geysers of Iceland and the waters of the Danube, 
while animal and vegetable organisms possessed the power of taking 
up silex, as seen in sponge spicules, the beautiful Hyalonema and 
Eupledella, the siliceous cuticles of many plants, and the Diatomaceae, 
favourite objects with microscopists. 
