254 
PROCEEDINGS OF THE SOCIETY. 
attention to tlie difficulties met with in obtaining a cement for the 
covers of his cells, which would prevent the evaporation of the watery 
preservative fluid ; as Clark’s spirit-proof cement, which had been at first 
relied upon, had proved faulty in this respect. He believed, however, 
that a cement made of a mixture of half gold size with a solution of gum 
dammar in benzol would be found to answer the purpose, if this, when 
dry on the outside, was coated with another varnish, such as Ward’s 
brown cement, which is impervious to the solvents of the first cement, to 
keep the cement from losing all its moisture and becoming porous in 
consequence. 
Mr. Rousselet also recommended a variety of gold size known by the 
makers as “ extra stout,” which is thicker and less fluid than ordinary 
gold size, and will never dry hard and brittle. 
The President expressed the great indebtedness of the Society to 
Mr. Rousselet for bringing together so many beautiful examples of 
mounted rotifers for their inspection, and moved a hearty vote of thanks 
to him for having done so. This was put from the Chair and carried 
by acclamation. 
The meeting was then resolved into a Conversazione whereat the 
beautiful collection of preparations of Rotifera by Mr. Rousselet at- 
tracted special attention. The specimens exhibited were shown under 
about thirty Microscopes kindly lent for the occasion by Mr. C. Baker 
and Messrs. Ross. Many of the specimens were life-like in all respects 
but that of movement, and the admirable way in which such difficult 
objects as Melicerta, Stepkanoceros, Floscularia, Limnias, &c., were 
shown, in apparently natural condition, was a matter of general remark. 
The following Instruments, Objects, &c., were exhibited:— 
The President : — Two “ Cooke ” lenses made by Taylor, Taylor, and 
Hobson. 
Mr. Chas. Baker : — A new Mechanical Stage. 
Mr. Chas. Rousselet : — A collection of about 80 Rotifers, mounted. 
New Fellows The following gentlemen were elected Ordinary 
Fellows of the Society : — Mr. H. D. Kyrle Money Bellew, Mr. George 
Shields Eckford, Mr. Alfred Herbert Marsh, Mr. William Pearl, 
Rev. Jas. Thos. Pinfold, Mr. William Pinkney, Mr. F. Shillington 
Scales. 
