Monthly Mlcroscoplcftn 
Journal, Oct. 1, 1869. J 
( 217 ) 
NOTES AND MEMOEANDA. 
A New Dissecting Microscope. — We have examined an instrument 
recently brouglit out by Mr. Chas. Collins, and whicli we think will be 
found very useful by those who dissect 
under the higher magnifying powers. 
It has (as seen in figure) a tripod foot, 
and a large glass stage which is mova- 
ble, and can be replaced by a trough of 
gutta-percha or other material. The 
peculiarity of the instrument lies in 
the fact that Mr. Collins has adapted 
to the eye-piece a compound prism 
which acts as erector, and at the same 
time throws the rays from a vertical 
to a horizontal position, so that the 
head need not be stooped. We had 
thought that such an arrangement 
would have absorbed too much light, 
but we found dissection under the 
inch and two-inch extremity easy and Dissecting Microscope, 
comfortable. 
The Rules of the Royal Microscopical Society. — In answer to 
N. N., we may mention that the Society has a very large collection 
of objects and microscopes, and an excellent library. Lectures are 
not delivered, but papers are read and published, as N. N. may see in 
this Journal. Our correspondent should communicate (giving his 
real name and address) with one of the Secretaries. 
Mr. Ross's New Immersion Lenses. — ^Mr. Boss has just prepared 
a number of immersion lenses, which our readers will do well to 
examine. The working powers of the -Y^ih. appear excellent. There 
is a decided improvement over the dry glass in definition, and there 
is vastly more light. It must be remarked, however, that this new 
immersion lens is not a cheap objective like any of those made by 
Nachet, Hartnack, or Merz. The cost of labour in these countries 
prevents the possibility of producing a cheap first-class immersion 
object-glass. 
Meteorites under the Microscope. — Herr Tschermak and others on 
the Continent are investigating the structure of meteorites under the 
microscope. This is a new field for some of our workers in the Koyal 
Microscopical Society. 
Protoplasm, Life Force, and Matter. — Under this title a new 
work by Dr. Beale is announced to appear this month. 
How to Work with the Microscope.— A fourth edition of Dr. 
Beale's book is, we believe, issued. 
