Bauhaus-Universität Weimar

Titel:
Abridged Catalogue of Optical Instruments, Mathematical Instruments, Physical Apparatus, Meteorological Instruments
Person:
James W. Queen & Company
PURL:
https://digitalesammlungen.uni-weimar.de/viewer/image/lit38606/7/
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
        

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