690 
PROCEEDINGS OF THE SOCIETY. 
Mr. C. Beck exhibited four new Microscopes mounted on true tripod 
stands, the chief point about which was that they were well made, but 
got out at a very cheap price. They did not greatly differ from some 
of the other forms being made, but he might point out one improvement 
which he thought would be appreciated : this was that the milled head 
of the substage pinion came entirely outside the stand. 
He also exhibited a centrifuge which was an improvement upon the 
one exhibited at a former meeting of the Society. They had found that 
the number of parts could be reduced without impairing the result, and 
the instrument could consequently be made at a reduced cost. It was 
also now fitted with two aluminium guides for test-tubes, and with a 
lighter frame for carrying two small glass tubes with thermometer bore 
for use in determining the proportionate number of blood-corpuscles. 
There were also other tubes to be used for milk and for sedimentary 
bacteria. 
The President said ho was much pleased with these model Micro- 
scopes shown by Mr. Beck, which 'carried out one of the ideas he had 
always aimed at — the production of a really well made but not too 
expensive Microscope for students’ use. He thought the position of the 
milled head of the substage outside the stand was a great improvement. 
These Microscopes are described and figured on pp. 671 and 672. 
Messrs. Watson and Sons exhibited and described another Micro- 
scope named the “ Fram,” specially designed for students’ use, which is 
described and figured supra , pp. 673 and 674. 
The President thought this was a very suitable form of students’ 
Microscope, which again carried out his ideal of a really good small 
Microscope. He was very glad to see the efficient state which instru- 
ments of this class had attained in the hands of Messrs. Beck and 
Messrs. Watson. 
The thanks of the Society were unanimously voted to Messrs. Baker, 
Beck, and Watson and Sons for their exhibits. 
The President exhibited an interesting old Microscope by John Cuff, 
of Fleet Street, and an old French Microscope, descriptions of which 
will be found supra , pp. 674 and 675. 
The President said that he had received another packet containing 
specimens of micro-ruling from Mr. H. J. Grayson, of Melbourne, who 
in 1895 sent some specimens of his excellent work to the Society for 
exhibition. These rulings were of four kinds, two being micrometers, 
and two test-plates. The first was a most beautifully ruled plate con- 
taining ten bands, being the inch divided into thousandths, two-thou- 
sandths, &c., up to ten-thousandths. A photomicrograph of this plate 
was also sent. This would be handed round for inspection, and he 
hoped the Fellows would kindly examine it with a hand-lens, as it was 
the finest photomicrograph of ruled bands he had ever seen. As all 
these ruled slides were mounted in realgar with a refractive index of 
over 2*5, the lines stood out with a distinctness and brilliancy such as 
had not been seen before. The next plate was also a very useful one, 
as it contained hundredths and thousandths of an inch, and fourths, 
