72 PROCEEDINGS OF SOCIETIES. 
ance of gentlemen acquainted with and interested in the subjects 
of the papers. 
Mr. SuFFoLK, in compliance with a request from the chair, re- 
ferred to some tin cells which he had described at a previous 
meeting of the Society. His difficulty had hitherto been in obtaining 
more than one thickness of metal; but Mr. Collins, the optician, of 
No. 77, Great Tichfield Street, had taken an interest in the matter, 
and had had several different thicknesses of the metal rolled. 
The same gentleman had set up a punching machine, and the 
plates were now made without the conical burr, as at first. They 
were made of pure metal, and could be had of Mr. Collins at 
a very low price. 
Mr. Jazez Hoee remarked that he had used these plates for 
some time with great pleasure and satisfaction. He thought they 
were very useful in the formation of cells, as they adhered very 
well to marine glue, and they thus got rid of the nuisance of glass 
cutting. Of course, these cells would not supersede glass in using 
metallic solutions, such as the bichloride of gold. 
Mr. Surroxk said he had used such solutions as chloride of 
calcium, chloride of sodium, glycerine mixtures, and camphor 
water, for two or three years without any change in the cells. 
The thanks of the meeting were voted to Mr. Suffolk for 
bringing the subject again before the Society. 
The Prestpent then appealed to the members for duplicates of 
objects; and Mr. Loss, in supporting this request, remarked that, 
as the keeper of the cabinet, he regretted to say that there had 
never been a year in which so few slides had been contributed to 
the Society. 
The meeting then adjourned till the 9th of November. 
Nov. 14th, 1866. 
R. J. Farrants, Esq., in the chair. 
The minutes of the preceding meeting were read and con- 
firmed. 
Various presents were announced, and the thanks of the meet- 
ing voted to their respective donors. 
Certificates of nine candidates for admission into the Society 
were read and ordered to be suspended in the usual manner. 
Frederick Wm. Gay, Esq., 1138, High Holborn; James Wight, 
Esq., General Post Office ; John Salmon, Esq., Loughton ; John 
Hirst, junr., Esq., Dobcross, Manchester; Andrew Lows, Esq., 
Lowther Street, Carlisle; Frederick George Fitch, Esq., 40, High- 
bury New Park; Montagu Burnett, Esq., Alton; Stephen Helme 
Esq , 23, Lansdown Road, Dalston ; James John Smith, Esq., 56, 
Tollington Road; Frederick Henry Leaf, Esq., Burlington Lodge, 
Norwood; H. Turberville, Esq., Pilton, Barnstaple; Dr. A. 
