Leitz LMBI-T laboratory binocular compound microscope
Datecirca 1953
Inventory Number2009-1-0011a
ClassificationMicroscope
Subject
Maker
Ernst Leitz (company)
1849 - 1986
Maker
Bausch & Lomb Optical Company
1853-present
Maker
Clay-Adams Company, Inc.
founded circa 1916
Owner
Judah Folkman
1933 - 2008
Cultural Region
Place of Origin
Dimensions37 x 17 x 20.5 cm (14 9/16 x 6 11/16 x 8 1/16 in.)
Material
Accessoriesobjectives (4); eyepieces (8); oil bottle; dropper bottle; cover slips; case.
DescriptionThis is a Leitz laboratory binocular compound microscope of the LMBI-T design. It has a modern, inclinable stand with a V-shaped cast-iron base. The arm is a curved handle attached to an upright rectangular support that carries the rack and pinion and focusing knobs. The end of the arm carries an inclined binocular tube marked 1.25x. The interpupillary distance is adjustable by means of a calibrated knob. There is a chrome-plated quadruple, revolving nosepiece. The coarse and fine focuses appear to be made of nickel. Coarse focus is by rack and pinion. Fine focus is by micrometer screw.
The square mechanical stage has two verniers. Adjustments in x-y directions are made by a two nickel knobs mounted concentrically on the same axis. The substage illuminating apparatus includes a condenser with a small swing-out lens in addition to the large central lens. There is also a removable iris diaphragm and a swing out glass filter. The condenser is mounted on a vertical frame that can be adjusted up and down by rack and pinion. The base has a plano-concave mirror.
Eyepieces include a pair of Periplan 10x, a 10x B, and a 6x B, all Leitz. The last two are stored in a tall, plastic jar with a screw lid. There is an unsigned 10x wide angle, a 10x, and an unmarked eyepiece. There is also one Bausch & Lomb 10x eyepiece.
Objectives include the following:
C 1/12, oil immersion 100:1, A 1.30
3, 10:1, A 0.25
6L, 45:1, A 0.65
1h, 3.5:1, A 0.10
The canisters are all present and marked.
The fitted case is made of wood, covered in leatherette, and lined with a deep burgundy felt. It has metal corner protectors and three latches. The handle is missing.
Accessories in the case include a bottle of immersion oil (n/D = 1.515, v=49). It is dated "6. 12. 52." There is a glass oil dropper bottle of clear and amber glass. Two boxes of cover slips, partly used, were made in the USA.
Also found in the case are two laboratory prepared slides with stained specimens. One is marked, "DOG / #473 / 6 m," and the other is marked "aortic / essaft [?] / 70% IMO. / H.E F."
The square mechanical stage has two verniers. Adjustments in x-y directions are made by a two nickel knobs mounted concentrically on the same axis. The substage illuminating apparatus includes a condenser with a small swing-out lens in addition to the large central lens. There is also a removable iris diaphragm and a swing out glass filter. The condenser is mounted on a vertical frame that can be adjusted up and down by rack and pinion. The base has a plano-concave mirror.
Eyepieces include a pair of Periplan 10x, a 10x B, and a 6x B, all Leitz. The last two are stored in a tall, plastic jar with a screw lid. There is an unsigned 10x wide angle, a 10x, and an unmarked eyepiece. There is also one Bausch & Lomb 10x eyepiece.
Objectives include the following:
C 1/12, oil immersion 100:1, A 1.30
3, 10:1, A 0.25
6L, 45:1, A 0.65
1h, 3.5:1, A 0.10
The canisters are all present and marked.
The fitted case is made of wood, covered in leatherette, and lined with a deep burgundy felt. It has metal corner protectors and three latches. The handle is missing.
Accessories in the case include a bottle of immersion oil (n/D = 1.515, v=49). It is dated "6. 12. 52." There is a glass oil dropper bottle of clear and amber glass. Two boxes of cover slips, partly used, were made in the USA.
Also found in the case are two laboratory prepared slides with stained specimens. One is marked, "DOG / #473 / 6 m," and the other is marked "aortic / essaft [?] / 70% IMO. / H.E F."
Signedon vertical rack, on objectives 1/12 oel, 6L, and 3, and on canisters for the same plus 1h: E. LEITZ / WETZLAR [in achromat trademark]
on vertical rack, and on objectives 1/12, 6L, and 3: Germany
on binocular tube: Ernst Leitz / Wetzlar / Germany
on objective 1h: Ernst Leitz Wetzlar
on Periplan 10x eyepieces: LEITZ WETZLAR GERMANY
on 10x B, 6x B eyepieces: Ernst Leitz Wetzlar
on 10x eyepiece: B&L OPT. CO. U.S.A.
stamped on underside of cover slip boxes: ADAMS [in trademark cross, surrounded by] GOLD SEAL / NON-CORROSIVE
on lid of cover slip boxes: MADE IN U. S. A.
Inscribedserial number on vertical rack: 436865
by fine focus knob: 1 Intervall / 0.001 m/m
on binocular tube: 1,25x
on embossed plastic label tape on microscope arm: DR. FOLKMAN
on embossed plastic label tape on case lid: J. FOLKMAN
ProvenanceJudah Folkman, Harvard Medical School, Boston, Mass., 1953-2008; gift to CHSI by Paula Folkman, Dr. Folkman's widow, Brookline, Mass., 2009.
Historical AttributesWhen he entered Harvard Medical School in 1953, Judah Folkman purchased this Leitz microscope as a replacement for the Spencer microscope he had used from age thirteen. This microscope was used by Dr. Folkman through the mid-1970s during which time he laid the foundation for novel angiogenesis research which led, over the next forty years, to new therapies for cancer, macular degeneration, and other diseases that involved abnormal blood vessel formation. The concept of angiogenesis provided "an organizing principle of biology, essential for the growth of any mass from a cancerous tumour to an atherosclerotic plaque." [<i>Nature</i> 451 (14 February 2008): 781.]
(For more details about Judah Folkman's research with this instrument, please see the documents and references attached to this object record and the biography of Dr. Folkman.)
Ernst Leitz (company)
Date: circa 1953
Accessories: objectives (4); eyepieces (8); oil bottle; dropper bottle; cover slips; case.
Object number: 2009-1-0011b
Carl Zeiss Jena
Date: circa 1928
Accessories: oculars (3)): 10x Mobimi, 15x & Mobimi, 10x; objectives (3) 90 / 1.25, 40 / 0.65, 10 / 0.30; canisters (3): 90, 40, 8; mechanical stage on vulcanite; Abbe illuminator; triple nosepiece; stops (2): 1, r; screwdriver with locking screw and washer; wrench; standing case; key.
Object number: 1996-1-0339
Ernst Leitz (company)
Date: circa 1937
Accessories: standard eyepieces (3): 8X P, Periplan. OK 10X, and Periplan. Ok. 25X; wide eyepieces (3): 1, 1, 8X, 10X; objectives (4) in fitted case: 1b 4.3X, 3 10X, P7 62X, P 1/12 oel; waveplates (2); condenser with polarizer; mechanical stage; loupe 6x; box of cover glasses; standing case; key; objective adaptors (4); and watch keys (2)
Object number: 1999-1-0020a
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
Carl Zeiss Jena
Date: circa 1932
Accessories: objectives (4): 3 achr. 8x, 10x, 20x , APO 40; ocular Mobimi K7x; condensor; mechanical stage; stereo set of ocular caps and stop; Abbe condensor; standing case.
Object number: 1370
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
Carl Zeiss Jena
Date: 1932-1940
Accessories: oculars (2): Leitz 6x; objectives (3): HI 90 / 1.25, 40 / 0.65, AA 10 / 0.30; condenser with iris; triple nosepiece; attached mechanical vulcanite stage
Object number: 1996-1-0345
Carl Zeiss Jena
Date: circa 1910
Accessories: ocular: K 20x ; objectives (3): Zeiss 2 mm HI, Zeiss 40 apochromat, B&L 10x apochromat; Abbe condenser; iris diaphragm; standing case
Object number: 1365
Ernst Leitz (company)
Date: 1888
Accessories: objectives (5): Leitz immersion 1/12 and 1/20, objectives 3, 5, 7 in leather covered wooden fitted box [1067b]; oculars (3): 0, 1, 3; dark field and disk diaphragms (2); cup diaphragms (3) with slide holder; Abbe condenser; extra substage mirror; iris diaphram and mirror on one bracket; microscope case with key; Leitz Bi-centric darkfield condenser Model B in brown leather shaped box [1167d]; set of test slides in a wooden box [1167c]
Object number: 1067a
Ernst Leitz (company)
Date: circa 1963
Accessories: AO oculars (2): 15x WF; Leitz objectives (2): Oel 100/1.3, 40/0.65; Achromatic, centerable condensor NA 0.9 with iris; mechanical stage; lamp.
Object number: 1996-1-0341
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
Carl Zeiss Jena
Date: circa 1928
Accessories: oculars(2): a pair of K 15x Mobimi; objectives (3): apochromats 20 n.a. 0.65 and 70 n.a. 1.25, and achromat 8 n.a. 0.20; mechanical stage; condenser with iris diaphgragm; locking screw with washer and screwdriver; standing case, key.
Object number: 1369