Thoma-type haemacytometer
Date1885
Inventory Number1126d
ClassificationHaemacytometer
Subject
Maker
Carl Friedrich Zeiss
1816 - 1888
Maker
Carl Zeiss (company timeline)
founded 1846
Maker
Carl Zeiss, Optische Werkstätte, Jena
1846 - 1904
Inventor
Ernst Abbe
1840 - 1905
Cultural Region
Place of Origin
Place of Use
Dimensionscase: 2.3 × 17.8 × 7.8 cm (7/8 × 7 × 3 1/16 in.)
Material
Accessories
DescriptionThis haemacytometer (inv. 1126d) was an accessory ordered by Dr. Harold Ernst to be used with his Zeiss laboratory compound microscope with stand I (inv. 1126a).
Stored in the main flat case of the microscope, the haemocytometer (blood corpuscle counting apparatus) has its own leather-bound case. To open the box, one pulls a nail on the front corner of the box. The top of the case is stamped, "BLUTKÖRPERZAHLAPPARAT / NACH THOMA" and "C. ZEISS JENA."
The case contains a graduated glass pipette attached to a rubber tube, which is joined to an ivory mouth piece. The center of the case holds a cross-line micrometer which is on a glass slide marked, "0.100 mm. / 1/400 qmm." and "C. Zeiss / Jena." This indicates that the shallow cell (the counting chamber) on the slide is 0.1 mm deep and divided into 400 squares. A glass cover slip is included.
Stored in the main flat case of the microscope, the haemocytometer (blood corpuscle counting apparatus) has its own leather-bound case. To open the box, one pulls a nail on the front corner of the box. The top of the case is stamped, "BLUTKÖRPERZAHLAPPARAT / NACH THOMA" and "C. ZEISS JENA."
The case contains a graduated glass pipette attached to a rubber tube, which is joined to an ivory mouth piece. The center of the case holds a cross-line micrometer which is on a glass slide marked, "0.100 mm. / 1/400 qmm." and "C. Zeiss / Jena." This indicates that the shallow cell (the counting chamber) on the slide is 0.1 mm deep and divided into 400 squares. A glass cover slip is included.
Signedon case: C. ZEISS JENA
on slide: C. Zeiss / Jena
Inscribedon case: BLUTKÖRPERZAHLAPPARAT / NACH THOMA
Curatorial Remarks
FunctionThe haemacytometer is a device for counting blood corpuscles. The name is also applied to similar devices with counting chambers that are used for determining the number of cells per unit volume of a suspension.
ProvenanceHarold C. Ernst; Department of Bacteriology; Harvard Medical School; Ernst-Lewis Collection of Microscopes (inv. no. 126), Harvard Medical School.
Historical AttributesOwned by Harold C. Ernst, M.D., first bacteriologist in the United States. A letter (in the file) from Carl Zeiss to Harold Ernst in 1885 promises that this order from the factory would be expedited. Dr. Ernst worked at the time with Robert Koch and this was probably the reason for this extra attention.
Carl Friedrich Zeiss
Date: 1885
Accessories: oculars (2): 5, 5 x 1.5; objectives (2): aa and E with canisters; Abbe condensor with swing-out mount for disk diaphragms; disk diaphragms (6); 2 cup diaphragm / cylinder stop holders; cup diaphragms (3); nicol prism polarizer in half canister; instrument case; stereoscopic eyepiece (1126c); camera lucida (1126b); blood corpuscle counting apparatus (1126d).
Object number: 1126a
Spencer Lens Company
Date: 1945-1955
Accessories: box
Object number: 2003-1-0084a
Carl Friedrich Zeiss
Date: 1885
Accessories: case.
Object number: 1126b
Spencer Lens Company
Date: circa 1937
Accessories: mouth pieces (2), pipettes with rubber tubes (2), cover slips (2), cardboard case
Object number: 1990-2-0006
Carl Zeiss, Optische Werkstätte, Jena
Date: circa 1885
Accessories: objectives (4): A, C, F, and DD; 1 ocular: 5; small-parts box with ocular micrometer case; key; Abbe drawing camera in separate box (1125c); box to hold objectives; standing case.
Object number: 1125
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, Optische Werkstätte, Jena
Date: circa 1898
Accessories: oculars (4): 2, 4, and compensating oculars 6, 8; objectives: AA, DD, a2, and apochromat HI 2.0 mm; triple nosepiece; swing-out condenser with iris-cylinder diaphragm; disk diaphragm and central stop diaphragm; filter; eyepiece micrometer, brush, spare stage clips; large mechanical stage (2006-1-0114b); centering glass (2006-1-0114c) with instructions; magnification tables (2); standing case; key; leather traveling case (2006-1-0114d).
Object number: 2006-1-0114a
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
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 Zeiss, Optische Werkstätte, Jena
Date: 1898-1905
Accessories: oculars (5): 2, 2, 4, 8 compens, 12 compens; objectives (4) in canisters (5): a2, B, C [missing], E, F; rotary stage; lenses on handles (2); small posterior lens; eyepiece micrometers (2); brush; spare stage clips; pointer; key; dual nosepiece; standing case; leather traveling case.
Object number: 1997-1-1931a
