B&L CTAV binocular compound microscope
Datecirca 1950
Inventory Number1996-1-0129
ClassificationMicroscope
Subject
Maker
Bausch & Lomb Optical Company
1853-present
Maker
Ernst Leitz (company)
1849 - 1986
Cultural Region
Place of Origin
Dimensions35 x 20 x 19 cm (13 3/4 x 7 7/8 x 7 1/2 in.)
Material
Accessoriesoculars (2); objectives (4)
DescriptionThis is a Bausch & Lomb binocular compound microscope with a stand CTAV. It is equipped with a large binocular body with a revolving triple nosepiece, a mechanical stage, a blackened u-shaped base, and a curved arm. A condenser with an iris diaphragm on an adjustable support is located beneath the stage. There is no substage mirror.
The coarse adjustment on this instrument is by rack and pinion. The fine adjustment is a knob located on the side of the arm.
The coarse adjustment on this instrument is by rack and pinion. The fine adjustment is a knob located on the side of the arm.
In Collection(s)
Signedon instrument: B & L [in prism trademark]
on instrument: E. Leitz Weltzar
ProvenanceMr. Jack Howard, Biology Prep Room, Harvard University, Cambridge, MA
Historical AttributesThis instrument was used by Mr. Jack Howard in the Biology Prep Room, Harvard University, Cambridge, MA.
Bausch & Lomb Optical Company
Date: 1930-1935
Accessories: micrometer eyepiece; oculars (5): 1 Leitz 8x, 1 pair B&L 6.4x, 1 pair B&L 12.5x; objective: Spencer 48 mm., 2.2x; monocular tube; glass bottle for immersion fluid; B & L canisters (3); case with key
Object number: 2003-1-0007
Bausch & Lomb Optical Company
Date: circa 1940
Accessories: oculars (6); objectives (3); condensor; case
Object number: 1996-1-0128
Bausch & Lomb Optical Company
Date: circa 1940
Accessories: apochromatic objectives (4): 90x, 47.5x, 20x, 10x; oculars (4): 1 pair 15x WF, 1 pair 10x WF; Abbe condenser.
Object number: 2003-1-0008
Bausch & Lomb Optical Company
Date: circa 1903
Accessories: eyepiece; objectives (3): "Variable", 2/3" 0.24 NA, 1/6''; triple nosepiece; substage including Abbe condenser; revolving mechanical stage
Object number: 2002-1-0055
Bausch & Lomb Optical Company
Date: circa 1899
Accessories: ocular micrometer; 1 B&L objective 2/3 "; triple nosepiece; standing case
Object number: 1352
Bausch & Lomb Optical Company
Date: 1883-1884
Accessories: objectives (3): 1/8, 1/4, 3 inch; oculars (2): B1, B2.
Object number: 1149
Bausch & Lomb Optical Company
Date: 1900-1908
Accessories: objectives (3): 2 mm, 4 mm, 16 mm; oculars (2): 5, 10; condenser with two diaphrams; standing case with lens card
Object number: 1298
Bausch & Lomb Optical Company
Date: 1925-1930
Accessories: oculars (2); objectives (2); case
Object number: 1996-1-0127
Bausch & Lomb Optical Company
Date: circa 1899
Accessories: B&L objectives on triple nosepiece and with cans (3): 1/12, 1/6, 2/3"; Zeiss objective for oil immersion: 40; Leitz mechanical stage; oculars (2): 1, 2; Abbe condensor; immersion oil can; standing case; key; spare stage clips.
Object number: 1351
Bausch & Lomb Optical Company
Date: 1910-1916
Accessories: 1 objective: Spencer 10x; 1 B&L eyepiece :7.5; double nosepiece
Object number: 1354
Bausch & Lomb Optical Company
Date: 1937-1945
Accessories: oculars (2): 5x, 10x; B&L objectives with plastic cans (3): 16, 4, 1.8 mm; Abbe condensor; dark stop; blue filter; standing case
Object number: 1357
Bausch & Lomb Optical Company
Date: 1897-1908
Accessories: ocular: 2; objectives (6): B. & L. 1/12, 1/2, 2, Reichert No. 3 and No 7a (missing), Spencer & Smith 1/4, 1; immersion oil in canister; blue filter; square cover glasses; dark-field stop; empty pillbox for cover slips; 5 Triple Alliance glass slides in paper; magnification table; case; key.
Object number: 1387