JAMES W, QUEEN & CO., PHILADELPHIA.
5
SIMPLE MICROSCOPES, WITH STANDS.
No.
3ÜÖÜ, The Excelsior Microscope* with 2 dissecting ueedlcs and 3 lenses,
Prica.
. $2 75
3050.
The neat walnut ease furnished with this Microscope, and into which it packs,
serves as a stand when in use, as shown. It contains an adjustable mirror for illu¬
mination of transparent objects; when opaque objects are under examination, the
diaphragm shown is used to shut off the light. This is supported by a steel stem,
which also carries die stage and lenses. The lenses (No. 30242 } may be used sepa¬
rately from the stand, and carried in the pocket, when desired. The stage slides
smoothly upon the stein for focussing, and may be clamped in position by the set¬
screw; it may he used for the examination of objects in water, or reversed and used
with the flat side up, if preferred. The power ranges from about 5 to 25 diameters,
which is sufficient to show the separate corpuscles of frog's blood, and a very great
variety of interesting objects. As a dissecting Microscope, its efficiency may be
great! v increased by temporarily screwing the ease fast to a board about 6 inches
square (as recommended by Mr. Phiri) ; this may be done without defacing the
instrument.
3051. The Excelsior Microscope, same as above, but with 2 lenses ; power
about 5 to 18 diameters, «....... , $2 50