PROCEEDINGS OF SOCIETIES. 119 
parallel glass, though different modes might be necessary for 
different objects. Another matter he should mention was, that 
Professor Smith had informed him that Messrs. Powell and Lea- 
land’s object-glasses worked the best. This was because they 
were all black inside, and there was no double reflection. His 
own +'; object-glass did not work well; Mr. Powell suggested that 
this might be caused by the brass inside, and blacked it, after 
which it worked excellently. 
A Memeer thought it would be necessary to have a horizontal 
stop, so as to cut off, when necessary, different proportions of 
large-angled glasses. He could not find any object that worked 
well with extravagantly angled glass. 
Mr. Gray spoke in favour of Mr. Smith’s arrangement, which, 
he thought, left nothing to be desired. It provided a means of 
modifying the light to any extent, and thus preventing the milki- 
ness complained of. 
Mr. Beck objected to that arrangement—first, because it cut 
off part of the aperture of the object-glass, and, secondly, because 
the microscope could not be used with the binocular. He (Mr. 
Beck) had worked with ;,th with the illuminator, which showed 
the scales, &c., with the binocular. 
Mr. Weyuam said that the binocular was suggested more than 
five years ago by Mr. Hewitt, and he ignored it then because 
in the high powers it cut off half the aperture of the object-glass. 
This was a defect, inasmuch as it cut off half the field. 
Mr. Gray suggested that this disturbance might be remedied 
by a piece of glass placed between the object-glass and the eye- 
piece. They would then have one half the object-glass entirely 
unobstructed, and the illumination thrown upon the other half 
was what was required. 
The PresrpEent thanked the gentlemen who had spoken, in the 
name of the Society, for having given the results of their experi- 
ence, and announced that at the next ordinary meeting papers 
“On a Brass Slide” would be read by Dr. Maddox, and “Ona 
Small Holder for a Clip” by Mr. Smith, and a further paper by 
Mr. Tuffen West. 
- Adjourned to 14th February, 1866. 
QueEKerr MicroscoricaL Civs. 
The Monthly Meeting of this Society was held by permission 
of the Council at University College, Gower Street, on the 23rd 
ultimo, (March) ; a removal to more commodious rooms having 
become necessary from the rapidly increasing number of its 
members. 
Mr. M. C. Cooke, V.P., who occupied the chair, read an interest- 
ing paper on “Universal Microscopic Admeasurement,” the 
object of which was the advocacy of the universal adoption of the 
French measurement with the “millimetre” as the standard for 
