FIFTY-SIXTH ANNUAL REPORT. 371 



February. — The Part played by certain Microscopic Plants in the 

 Nutrition of the Higher Plants, by Dr. A. B. Rendle, M.A., 

 F.R.S. 



March. — The Larva of Corethra plumicornis, by S. C. Akehurst, 

 F.R.M.S. 



A/pril. — Diatom Structure, by N. E. Brown, A.L.S. 



ifay.— Microscopical Drawing, by C. D. Soar, F.L.S., F.R.M.S. 



May. — Light Filters for Visual Work in Microscopy, by J. H. 

 Pledge, F.R.M.S. 



June, — Some Facts and Fallacies of Practical Microscopy, by 

 A. A. C. ElHot Merlin, F.R.M.S. 



June. — Notes on Parasitic Acari, by Stanley Hirst. 



October. — Deep sea Deposits, by A. Earland, F.R.M.S. 



November. — Pinus sylvestris, by F. Addey, B.Sc. 



December. — Microscopy as an Aid to Analysis, by T. E. WalKs. 



December.— The Focus Aperture Ratio, by E. M. Nelson, F.R.M.S. 

 In addition to the above, we have had the good fortune to have 



from Mr. E. M. Nelson several short papers on various items of 



interest in microscopy. Those perhaps of most general interest 



were his notes on : 



Mirrors made of Stainless Steel for the Microscope ; 



The Use of Golden Syrup as an Immersion Medium for Con- 

 densers ; 



Polariziation and N.A. ; and 



A New Form of Polariscope. 



Then we have had two or three exhibits of considerable interest : 



A Portable Lamp, exhibited and explained by Dr. J. Tierney ; 



A Low-power Polariscope, by Mr. Wood ; 



Method and Apparatus for measuring the Refractive Index of 

 Oils used in Medicine, by Dr. Smart ; 



The Measurement of the Vertical Dimensions of Objects by the 

 Use of the Graduated Fine Adjustment, by F. Addey, B.Sc. 

 We were very fortunate in being able to have exhibits on three 



successive occasions by Messrs. Watson & Sons, Messrs. R. & J. 



Beck, Ltd., Messrs. Baker & Co., of their general microscopic 



apparatus. These were shown in the Library adjoining the 



meeting-room, and proved of considerable interest to members. 



It is hoped that on some future occasion we may have further 



exhibits of a similar character. 



On behalf of the Members the Committee thanks the Authors 



