drum compound microscope
Datecirca 1870
Inventory Number1160
ClassificationMicroscope
Subject
Maker
E. Hartnack & A. Prazmowski
1870 - 1898
Cultural Region
Place of Origin
Dimensionsmicroscope: 21.3 × 8 × 7 cm (8 3/8 × 3 1/8 × 2 3/4 in.)
case: 7.1 × 12.5 × 22.5 cm (2 13/16 × 4 15/16 × 8 7/8 in.)
case: 7.1 × 12.5 × 22.5 cm (2 13/16 × 4 15/16 × 8 7/8 in.)
Material
Accessoriesobjectives (2): 4 and 7; ocular: 3; tweezers; brush; 2 dissecting needles; scalpel; glass rod dropper; flat case with key; table of magnifications.
DescriptionThis brass drum microscope is of the French pattern.
The substage mirror is held in a brass drum with an aperture to permit light to reach the mirror. The mirror is tilted by means of a knob on the outside of the drum. On top of the drum is a rectangular stage. Above the stage is a sleeve that carries the body tube, which has an ocular draw tube. Coarse focus is by draw tube. Fine focusing is by means of a screw lifting the stage. The round base of hard lead alloy is painted green.
Attached to the microscope, there is one ocular marked 3 and one objective on a nosepiece marked 4. A spare nosepiece marked 7 with a convertible objective is stored in the case. These have large diameter male threads of 23.3 mm O.D. and 40 threads/inch, and are probably Whitworth profile.
This drum microscope has its original optics and table of magnifications. The case and table bear the same serial number: 13780.
The flat mahogany case is dovetailed. It has a padded cushion of gree silk in the lid. Other parts are cushioned with green velvet. There is a steel key. In a covered chamber are brass tweezers, two dissecting needles with ebony handles (one is missing the needle, but has a sewing needle as replacement), a brush with a quill handle, a scalpel with an ebony handle, and a glass rod with a point for use as a dropper.
The substage mirror is held in a brass drum with an aperture to permit light to reach the mirror. The mirror is tilted by means of a knob on the outside of the drum. On top of the drum is a rectangular stage. Above the stage is a sleeve that carries the body tube, which has an ocular draw tube. Coarse focus is by draw tube. Fine focusing is by means of a screw lifting the stage. The round base of hard lead alloy is painted green.
Attached to the microscope, there is one ocular marked 3 and one objective on a nosepiece marked 4. A spare nosepiece marked 7 with a convertible objective is stored in the case. These have large diameter male threads of 23.3 mm O.D. and 40 threads/inch, and are probably Whitworth profile.
This drum microscope has its original optics and table of magnifications. The case and table bear the same serial number: 13780.
The flat mahogany case is dovetailed. It has a padded cushion of gree silk in the lid. Other parts are cushioned with green velvet. There is a steel key. In a covered chamber are brass tweezers, two dissecting needles with ebony handles (one is missing the needle, but has a sewing needle as replacement), a brush with a quill handle, a scalpel with an ebony handle, and a glass rod with a point for use as a dropper.
SignedOn sliding tube: E. Hartnack & A. Prazmowski / Rue Bonaparte, 1 / Paris
Curatorial RemarksThe table of magnifications is stored in the instrument's file.
ProvenanceDr. Francis M. Rackemann, Massachusetts General Hospital, Boston, MA, before 1952; gift to Ernst-Lewis Collection of Microscopes (inv. no. T-8), Harvard Medical School, 1952.
Historical AttributesLabel from Ernst-Lewis collection reads: November 18, 1952, presented to the Harvard Medical School by Dr. Francis M. Rackemann.
Georges Oberhaeuser
Date: 1840-1850
Accessories: 1 convertible objective; 1 eyepiece; 7 glass slides; 10 prepared slides labeled in French; 2 dissecting needles; trough; quartz; cover slip; box.
Object number: 1153
Georges Oberhaeuser
Date: circa 1845
Accessories: objectives (3): 7 and 4 on nosepieces, unnumbered one detached; oculars (2); bull's eye condenser; live box; glass slides (4); case; key.
Object number: 1384
Georges Oberhaeuser
Date: 1848
Accessories: objectives (2): 4 and 7; oculars (2): 2 and 3; bull's eye lens; 2 boxes of cover glasses; numbered mahogany flat case with key.
Object number: 1165
Bernard Davis
Date: circa 1869
Accessories: telescope / microscope eyepiece; telescope field lens and solar eyepiece; case; instruction sheet.
Object number: 1232
Bernard Davis
Date: circa 1869
Accessories: telescope / microscope eyepiece; microscope objective; solar telescope eyepiece; glass discs (4); horizontal case
Object number: 1254
English
Date: circa 1795
Accessories: 1 ocular; 6 objectives: 1 to 6; stage condenser; stage forceps; live box; live well (watch glass); black/white stage plate; fish tube; 6 prepared wooden slides; tweezers; dissecting needle; a quill; bull's eye lens on stand; round brass box; 3 narrow glass slides; 3 glass slides; flat mahogany case.
Object number: 1303
English
Date: circa 1830
Accessories: 1 ocular; objectives (3): 1, 2, and 3; a live box; dissecting needle; stage forceps; a glass stage disk; a black and white disk; a mica disk; two glass slides; list of specimens; case.
Object number: 1053
Constant Vérick
Date: circa 1885
Accessories: objectives (2): 2, 7; objective box; spare nosepiece; oculars (3): 1, 2, 3; ocular that is too small: 0; dissecting needles (2); tweezers; flat case; key.
Object number: 1034
Camille Sébastien Nachet
Date: 1845-1850
Accessories: oculars (2): unmarked; objectives (7) : ?, 1(?), 2, 3, 4, 6, 7 in fitted wood box (1081b); mechanical stage (1081c); adjustable bull's eye; concave substage mirror; diaphragm wheel; specimen tray; black-white disk; case.
Object number: 1081a
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
Charles-Louis Chevalier
Date: circa 1840
Accessories: 2 convertible objectives: 1, 2, 3 and 0,00,000; 2 oculars; simple magnifiers: 3 and 5, with support bracket; extension pillar; bull's eye stage condenser on jointed arm; forceps; 3 prepared slides; box of cover glasses; 1/100 mm stage micrometer; camera lucida; tall bell jar; padlock on chain; case with key; table of magnifications
Object number: 1079
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