596 PROCEEDINGS OF THE SOCIETY. 



gauge ; also, that in selecting the sizes mentioned by the Chairman, 

 regard had been had to those which were at present in most frequent 

 use, so as not to disturb existing arrangements more than could be 

 helped. 



The following Papers were taken as read : — 



" Plant Crystals," by Dr. Aser Poli, of Eome. 



" Note on the Eev. G. L. Mills' Paper on Diatoms in Peruvian 

 Guano," by Mr. F. Kitton. 



" On the Estimation of Aperture in the Microscope," by the late 

 Mr. Charles Hockin, jun. 



The following Instruments, Objects, &c, were exhibited : — 



Mr. Ahrens : — New Erecting Binocular Microscope. 



Mr. Bolton : — Spawn of Perch. 



Mr. Crisp : — (1) Balkwill's Slide of Foraminifera. (2) Hardy's 

 Compressorium (see p. 553). (3) Malassez's Compte-Globules (see 

 p. 559). (4) Tolles' |-inch objective with very tapering front. (5) 

 Tolles' Camera Lucida (see Vol. III. p. 527). 



Mr. Ingpen: — Steinheil's High-power Achromatic Eye-pieces, 

 f-inch, ^-inch, and ^-inch. 



Prof. Liversidge : — " Silver-Fish " (Lepisma) from Sydney, N. S. 

 Wales. 



Mr. B. Miller : — Caoutchouc Cement. 



Dr. Balph : — Vallisneria from Melbourne. 



Dr. G. M. Sternberg : — Photographs of Bacteria (see p. 571). 



New Fellows. — The following were elected Ordinary Fellows : — 

 Messrs. William Borrer, jun., William E. Pickels, John Bookledge, 

 Thomas C. Squance, M.B. and M.S., and Prof. Albert H. Tuttle,M.Sc. 

 (At p. 443 for Henry Pocklington read Christopher Pocklington.) 



Walter W. Beeves, 



Assist. -Secretary. 



