Beck polarizing compound microscope
Datebefore 1889
Inventory Number1204a
ClassificationMicroscope
Subject
Maker
R. & J. Beck
1865 - 1920
Cultural Region
Place of Origin
Dimensions36 x 20 x 13.5 cm (14 3/16 x 7 7/8 x 5 5/16 in.)
Material
Accessoriesobjective with canister; oculars (2); vertical illuminator attachment with iris and adjustable mirror; polarizer (analyzer missing); small leather case; extra coaxial illuminator mirrors (5)
DescriptionItem 1204a is a Beck polarizing compound microscope. It has a flat tripod-shaped base, a jointed arm, and a brass body tube equipped with a polarizer and a single objective. The coarse adjustment is by rack and pinion. The fine focus is by a knob on top of the post. A vertical illuminator attachment is fitted between the objective lens and the tube.
The microscope has a circular stage that rotates and tilts. Substage equipment includes a holder for disc diaphragms and lenses, and a mirror, all on an adjustable arm.
Item 1204b is a coaxial epi illuminator with several different adjustable mirror diagonals.
The microscope has a circular stage that rotates and tilts. Substage equipment includes a holder for disc diaphragms and lenses, and a mirror, all on an adjustable arm.
Item 1204b is a coaxial epi illuminator with several different adjustable mirror diagonals.
Signedon base: R & J BECK / LONDON & PHILADELPHIA
Inscribedon base: 10555
FunctionThis instrument was used for mineralogy in Geology Department.
ProvenanceGeology Department, Harvard University
R. & J. Beck
Date: before 1889
Accessories: objective with canister; oculars (2); vertical illuminator attachment with iris and adjustable mirror; polarizer (analyzer missing); small leather case; extra coaxial illuminator mirrors (5)
Object number: 1204b
Carl Zeiss, Optische Werkstätte, Jena
Date: circa 1886
Accessories: oculars (2): Leitz 4xB, Winkel Zeiss kl 2; objectives (4): Leitz 7, 1/7a oil immersion, Zeiss B, HI 90 iris, B&L 8mm, 1/5, Grunow 1/6; B&L double nosepiece; parabolic reflector for stage; Abbe condensor with iris-cylinder diaphragm; articulated substage mirror; frame for cup diaphragms; cup diaphragms (2); Zeiss-B&L polarizing analyzer A6; Zeiss-B&L vertical illuminator; flat case; key.
Object number: 1044
Bausch & Lomb Optical Company
Date: 1950-1960
Accessories: arc lamp, power supply, and carbons original to this microscope have been separated from it (1998-1-1637a). Objectives (3): 10X, 21X, 43X; vertical illuminator; projection eyepiece.
Object number: 1998-1-1637
A. Nachet
Date: 1880-1890
Accessories: 1 Objective # 2 with society thread; 1 projection eyepiece; mechanical stage; split aperture epi illuminator; no case, but came with a cover (separately cataloged as 1279b).
Object number: 1279a
James W. Queen & Company
Date: circa 1873
Accessories: objective 1/2" engraved W. Wales, NY.; eyepiece 32.3 mm in diameter; diaphragm wheel; articulated concave mirror for illumination; wooden base
Object number: 2002-1-0051
R. & J. Beck
Date: 1876
Accessories: oculars (2) in microscope; Darker's selenite retarding filters (3); wheel diaphragm; mechanical rotary stage; stage slider. Other accessories are in the case (1122b), including monocular draw tube; oculars (3); objectives in cans (5); empty can; Lieberkühn; polarizing set; slides; camera lucidas (2); etc.; plus a Beck patent substage condenser (1122c); and apertometer (1122d).
Object number: 1122a
R. & J. Beck
Date: circa 1884
Accessories: oculars (2); double nosepiece; mahagony case with various parts (see description)
Object number: 1083
R. & J. Beck
Date: circa 1885
Accessories: objectives (3); paired oculars
Object number: 1273
Carl Zeiss (company timeline)
Date: circa 1891
Accessories: objectives (4): Leitz 3, 7, 1/12 HI with canisters and Zeiss AA in DD canister; oculars (2): 3 and 3 H.M.S. 13,0; triple nosepiece; Abbe illuminator with iris; standing case
Object number: 1241
Smith, Beck & Beck
Date: circa 1860
Accessories: complete set of approximately 50 accessories in two boxes [see early file card]
Object number: 1237
Spencer Lens Company
Date: 1940-1945
Accessories: oculars (2): 9x; paired objectives (3): 6x, 3x, 1x.; illuminator; base board; case; key
Object number: 1391
American
Date: circa 1865
Accessories: 1 Objective; 1 eyepiece; Sub-stage concave mirror
Object number: 2002-1-0048