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Preliminary Announcement 
PROGRAMME for the SESSION 1922-1923 
October 18 ... 
Professor Robert Chambers. 
Communicated by Professor R. Ruaqles Gates , 
M.A , Ph.D ., F.R.M.S. 
“ New Apparatus and Methods for the Dissection and 
Injection of Living Cells.” 
Mr. Thomas F. Connolly, M.B.E., M.Sc., F.Op.S., 
F.R.M.S. 
(Inspector of Scientific Supplies, India Office) 
“ The Specification of a Medical Microscope.” 
Mr. Humphry J, Denham, M.A.(Oxon,), F.R.M.S. 
“ A Micrometric Slide Rule.” 
November 15 Mr. Conrad Beck, O.B.E., F.R.M.S. 
“ Glare and Flooding in Microscope Illumination.” 
Dr. Charles Singer, M.A., F.R.C.P., F.R.M.S. 
“ The First Mechanical Microtome.” 
Professor Gobind Singh Thapar, M.Sc., F.R.M.S. 
“ The Occurrence and Significance of a Third 
Contractile Vacuole in Paramecium caudatum!' 
Professor B. L. Bhatia, M.Sc., F.Z.S., F.R.M.S, 
“ On the Significance of Extra Contractile Vacuoles 
in Paramecium caudatum .” 
December 20 
1923. 
January 17 
Mr. Joseph E. Barnard, F.Inst.P., F.R.M.S. 
“ Sub-Bacteria.” 
ANNUAL MEETING. 
PRESIDENTIAL ADDRESS. 
Professor Frederic J. Cheshire, C.B.E., F.Inst.P., 
P.R.M.S, 
“ The Petrological Microscope and its Optical Evolu- 
tion.” 
February 21... Professor Sir William Maddock Bayliss, D.Sc., 
F.R.S., F.R.M.S. 
“ Microscopical Staining and Colloids.” 
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