228 
PROCEEDINGS OE THE .SOCIETY. 
unscrews and leaves a sharp steel point by means of which the instru- 
ment could be affixed to a fence or tree for use in the field. Another 
point worth noticing is the correction adjustment of the objectives. It 
was listed in the 1878 Catalogue. The G. T. Brown, to whom is given 
the credit of the design, eventually became Sir George Brown, P.C. A 
number of these little stands were made, probably about three dozen.” 
The workmanship of this instrument is worth examination, and it 
constitutes one of the most interesting portable instruments of its type. 
In the description of the instrument care is taken to point out that 
the objectives have been specially corrected for the short tube length ; 
coarse adjustment is obtained by sliding the objective carrying tube in 
its fitting, and the fine adjustment is obtained by moving the eyepiece 
tube, which enables the object to be accurately focused. 
The price of this outfit when purchased was as follows : — 
£ s. d. 
Microscope in case with “ E ” eyepiece, 1-in. and best 
jt-in. objective with adjustment for correcting for 
cover-glass thickness. . . . . . 6 10 0 
jjs-in. objective with correction collar. . . .500 
T V-in. immersion objective with correction collar .500 
1 extra “ C ” eyepiece . . . . . .080 
1 extra “ D ” eyepiece . . . . . .090 
Polarizing apparatus . . . . . . 1 15 0 
Achromatic condenser with diaphragm for oblique 
light and dark ground . . . . .200 
Making a total of £21 2 0 
The thanks of the meeting were accorded to Mr. Watson Baker. 
Dr. Drew and Dr. Murray exhibited three preparations to show the 
improved results obtained in Heidenhain iron-alum hsematoxylin 
preparations, when purified haematoxylin is used for the staiuing solution. 
The method of purification will be published in the “ Proceedings.” 
They were thanked from the Chair for the exhibit. 
Dr. Murray read the following papers by Dr. H. Hartridge, M.A., 
M.D., F.R.M.S.: “Monochromatic Illumination,” “A Low-Power 
Eye-piece with Large Field.” 
Mr. Joseph E. Barnard, F.Xnst.P., F.R.M.S., read a paper entitled, 
“ The Future of the Microscope in Medical Research.” 
Hearty votes of thanks were accoided to the authors of the above 
papers and to Dr. Murray. 
The business proceedings then terminated. 
