B&L BB continental compound microscope
Datecirca 1899
Inventory Number1351
ClassificationMicroscope
Subject
Maker
Bausch & Lomb Optical Company
1853-present
Maker
Carl Zeiss, Optische Werkstätte, Jena
1846 - 1904
Maker
Ernst Leitz (company)
1849 - 1986
Owner
F. William Marlow Jr.
1902 - 1988
Cultural Region
Place of Origin
Dimensionsunassembled microscope: 31.7 × 16 × 11.3 cm (12 1/2 × 6 5/16 × 4 7/16 in.)
case: 41 × 17.7 × 22 cm (16 1/8 × 6 15/16 × 8 11/16 in.)
case: 41 × 17.7 × 22 cm (16 1/8 × 6 15/16 × 8 11/16 in.)
Material
AccessoriesB&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.
Bibliography
DescriptionThis is a Bausch & Lomb continental stand BB compound microscope. It has a brass body tube with the inner draw tube nickel plated and calibrated. The horseshoe-shaped foot is black enameled brass filled with lead. The pillar is also black enameled brass. The body tube is fitted with a three-objective, revolving nosepiece, which is nickel-plated. The openings are marked for the existing objectives: 2/3, 1/6, 1/12. The coarse focus is by rack and pinion. The fine focus is a vertical screw on the post above the stage. The index arrow is attached to a screw on the post bracket carrying the rack and pinion.
The rectangular stage is nickel-plated and topped with a slab of hard rubber. A mechanical stage by Ernst Leitz Wetzlar is screwed to it. This stage is of red brass and nickel-plated brass.
Below the stage, there is a condenser with two iris diaphrams (one located above and the other below) on a swing-out mount with a vertical screw adjustment. There is also a plano-concave mirror on swinging arm with a stop at the central position.
The microscope uses a cloth lining in the draw tube in the fashion of Spencer stands. [See early file card for further information]
There is an accompanying standing case with a brass handle on top. It has two pull-out drawers for objectives and eyepieces.
The rectangular stage is nickel-plated and topped with a slab of hard rubber. A mechanical stage by Ernst Leitz Wetzlar is screwed to it. This stage is of red brass and nickel-plated brass.
Below the stage, there is a condenser with two iris diaphrams (one located above and the other below) on a swing-out mount with a vertical screw adjustment. There is also a plano-concave mirror on swinging arm with a stop at the central position.
The microscope uses a cloth lining in the draw tube in the fashion of Spencer stands. [See early file card for further information]
There is an accompanying standing case with a brass handle on top. It has two pull-out drawers for objectives and eyepieces.
Signedmarked on foot in old English lettering: Bausch & Lomb Optical Co. / ROCHESTER, N. Y.
on revolving nosepiece: BAUSCH & LOMB OPT. CO.
marked on the clamp of the mechanical stage: E. Leitz Weltzar
on objectives (3): Bausch & Lomb Optical Co. / ROCHESTER, N. Y.
on cannisters (3): BAUSCH & LOMB OPTICAL CO. / ROCHESTER, N. Y.
on objective: CARL ZEISS / JENA [in achromat logo]
one eyepieces (2): BAUSCH & LOMB OPTICAL CO.
Inscribedserial no. on medalion of the heel of the foot: 45248
on fine focus screw on top of post: PAT. FEB. 16, 1897.
ProvenanceDr. F. William Marlow, Jr., Brookline, MA; Countway Library of Medicine, Harvard Medical School, c. 1980; transfer to CHSI, 1980.
Historical AttributesThis microscope was owned by Dr. F. William Marlow, Jr., an internist who was a longtime faculty member of the Harvard Medical School. Dr. Marlow also owned microscope nos. 1329 and 1333.
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
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
Carl Reichert
Date: circa 1879
Accessories: 5 objectives: Hartnack # 4, 7, 8, No. II Hom. Imm. No. 2 in Hartnack case; Homog. Oil immersion by Reichert in own case. 2 oculars: 2, 3; 2 disc diaphrams, 3 cup diaphrams which fit in sliding plate, sliding plate and holder for diaphrams; condenser; revolving nose piece; extra frame for mirror on slider; fitted case; key to case.
Object number: 1077a
Bausch & Lomb Optical Company
Date: circa 1918
Accessories: 1 ocular: 4x; B&L objectives (3): 16 , 4, 1.9 mm on triple nosepiece; B&L objective cans (2):1/6, 2/3; standing case
Object number: 1356
Boston Optical Works
Date: circa 1870
Accessories: 3 Tolles objectives: 1 with 3 fronts; empty can 8/10; 5 Tolles oculars 34 mm dia.: 2 all solid, 2 solid field l. & single eye lens, 1 std.; centerable condenser with diaphragm wheel; mech. stage; side illuminator prism; cabinet.
Object number: 1016a
R. & J. Beck
Date: circa 1878
Accessories: oculars (3); eye mask; Beck objectives with cans (2): 1, 1/6 in.; anonymous onjective: 1/15 in homog. im..; tweezers; triple nosepiece; Rousselet-type sliding stage; Abbe condenser; iris diaphgragm; cover slips (2); prescription envelope; instructions; lock parts; standing case with key.
Object number: 1362
Carl Zeiss, Optische Werkstätte, Jena
Date: circa 1902
Accessories: oculars (5); objectives (5); microplanar objectives (2); iris diaphragm; abbe condenser; collars and sleeves for photography; parts box; Leitz object micrometer (1308b); cardioid condenser (1308d); immersion oil bottle (1308c) ; Leitz erecting prism (1308e); standing case with key
Object number: 1308a
Bausch & Lomb Optical Company
Date: circa 1910
Accessories: objectives with original canisters (3): 1.9 mm 1.30 n.a., 4 mm 0.65 n. a.,16 mm 0.25 n. a.; oculars (2): 5, 10; immersion oil bottle; standing case with key
Object number: 1304
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: circa 1900
Accessories: eyepieces (2): B&L, 1X, and Leitz, 10X; objectives (2): 1/6 , 1/2; cardiod condenser; case
Object number: 2001-1-0032
Ernst Leitz (company)
Date: circa 1903
Accessories: no.3 ocular; Leitz objectives (3) on triple nosepiece: no. 3, 6, 1/12 immersion; Abbe condenser; iris diaphragm and filter mount; independent mechanical stage
Object number: 1375
Robert B. Tolles
Date: circa 1875
Accessories: 2 Tolles objectives: 1/8" dated 6/27/1866; 1/8" 120 deg. dated 3/7/1869, can marked: Immersion, also scratched: C. X. D. 1902; empty can for Tolles 1/4", now on inverted Tolles Nr. 1203; 2 oculars, no name, not solid, 24.5 mm dia.; Standing case.
Object number: 1127