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demonstration of Tolles stage fine adjustment

demonstration of Tolles stage fine adjustment

Robert B. Tolles
circa 1875
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eyepiece with focuser

Robert B. Tolles
1870-1890
French 3-element objective mounted by Tolles

French 3-element objective mounted by Tolles

Robert B. Tolles
1860-1874
hand-held simple microscope

hand-held simple microscope

Boston Optical Works
1868
large monocular compound microscope

large monocular compound microscope

Spencer Lens Company
circa 1875
microscope stage micrometer

microscope stage micrometer

William Augustus Rogers
circa 1875
parts box for objectives and oculars

parts box for objectives and oculars

Robert B. Tolles
1860-1874
parts box holding Tolles workshop objects

parts box holding Tolles workshop objects

Robert B. Tolles
1875-1900
pill box with mica cover slips and 2 glass filters

pill box with mica cover slips and 2 glass filters

Robert B. Tolles
1860-1874
pocket compound microscope

pocket compound microscope

Boston Optical Works
circa 1880
Queen Holmes's demonstration compound microscope

Queen Holmes's demonstration compound microscope

James W. Queen & Company
circa 1878
set of 5 Spencer objectives

set of 5 Spencer objectives

Robert B. Tolles
1860-1874
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