on Feb 25, 2017
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ANTIQUE BRASS MUSEUM OR DRAWING ROOM MICROSCOPE WITH ROTATING SPECIMEN DRUM AFTER THOMAS WINTER, DATED CIRCA 1825
from the early part of the 19th Century
Microscopes to the End of the Nineteenth Century”
Given the above information, I would conservatively date the instrument featured here to circa 1825
A second one was made by E. Leitz Wetzlar in 1906 and featured a rotating drum with full-size prepared slides that were inserted into the periphery of the drum and held fast with slide clips
This microscope is built upon an 80mm diameter round brass base
At one end of the bar is an articulating 20mm diameter plano mirror mounted in brass
The portion of the rotating drum nearest the limb is made of brass while the rest of the drum containing the specimen ports is made of wood
The overall width of the drum including both the brass and wood portions is 20mm
The outer face of the drum is machined with a total of 24 countersunk 7mm diameter holes into which mounted specimens would be placed for viewing
The individual transparent specimens placed in the ports are illuminated with the articulating 20mm diameter plano mirror described above
They can be illuminated with a 22 mm diameter articulating bullseye lens that is mounted near the top of the limb
The 20mm diameter body tube of this microscope is mounted on a slightly downward angled limb that extends laterally off of the top of the vertical limb
Mounted at the top of the body tube is a brass ocular holder into which is inserted a 16mm diameter brass mounted ocular (unmarked)
When set up for observations, this microscope stands about 7 inches tall and weighs about 2 pounds
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