289 
The number of members at present is 24, and the average in 
attendance at the meetings has been 9. 
The following subjects were discussed at the meetings :— 
1891. 
Oct. 13. Exhibition of objects, photo-micrographs, «ce. 
Noy. 10. Demonstration on measurement of aperture of objectives, 
by Mr. W. B. Poole. 
April 12. Demonstration of photo-micrography, by the Secretary, 
Mr. J. W. Bussell. 
May 10. Remarks on mouth parts of locusts, illustrated by 
mounted specimens, by Dr. Whittell. 
June 14. Gossip meeting and exhibition of objects. 
July 12. Paper on fermentation, by Mr. A. Dale. 
Aug. 9. Remarks on secondary structure of diatoms, illustrated 
by photo-micrographs, shown by lantern, by Mr. 
W. B. Poole: 
The balance-sheet submitted herewith shows a balance of 
£3 9s. Od. in hand after repayment of subscriptions handed over 
to the Treasurer of Royal Society. 
