192 
Sccrctarp. 
LESLIE J. MONTEFIORE. 
®OUJUtI. 
J. B. DANCER, F.R.A.S. 
E. C. BUXTON. 
JOHN PARRY. 
JOHN ROGERSON. 
JOSEPH SIDEBOTHAM. 
W.. C. WILLIAMSON, F.R.S., &c. 
Mr. George Wardley read a paper on “ Glass Trans- 
parencies/’ in the course of which he detailed the various 
processes generally in use for printing glass transparencies, 
dwelling especially on the modification of the taupenot, in 
which, after coating the plate with collodion, instead of 
immersing it in the sensitive bath, it is thoroughly washed 
with water to get rid of the ether and alcohol, and is then 
coated with iodised albumen ; the remainder of the process is 
then exactly as the taupenot. The tannin process answered 
well, but many prints were spoiled in consequence of halation. 
The best preservatives for printing transparencies were a mix- 
ture of tannin and honey, or tannin and raspberry syrup, 
the former giving brown and the latter black tones. The 
addition of the raspberry syrup to the tannin yielded pictures 
entirely free from halation. 
Dr. J. P. Joule, F.H.S., described some further im- 
provements in his camera, by means of which glass only 
came in contact with the silver solution. 
The following paper was read at a meeting of the Micro- 
scopical Section, held November 28th, 1864 — see page 52 : — 
“ Notes on Natural History Specimens lately received from 
Connemara,” by Thomas Alcock, M.D. 
The series of specimens which I have now to lay before 
you is so extensive, and I believe so interesting, that parts of 
it might properly form the material for several distinct com- 
munications ; but at present 1 propose to show them as a 
