Neubauer-type haemacytometer
Datecirca 1917
Inventory Number1997-1-1746
ClassificationHaemacytometer
Subject
Maker
Max Levy Company
founded 1872
Maker
Arthur H. Thomas Company
1900-present
Cultural Region
Place of Origin
Dimensionscase: 7.3 × 18.2 × 10.5 cm (2 7/8 × 7 3/16 × 4 1/8 in.)
Material
DescriptionThis is a Neubauer-type haemacytometer of the American standard form. The counting chamber platform is a rectangular glass plate with supporting ribs to hold the cover slip. Some surfaces are mirrored. There are two graduated pipettes attached to rubber tubes. One has a larger bulb than the other. The mouth pieces are bone or ivory. The rubber is red.
The apparatus is stored in a wooden box with a hinged lid. The interior is lined in green velvet. The exterior is covered in black leather embossed with a pattern.
The lid is marked: AMERICAN STANDARD HAEMACYTOMETER / WITH/ LEVY COUNTING CHAMBER.
The apparatus is stored in a wooden box with a hinged lid. The interior is lined in green velvet. The exterior is covered in black leather embossed with a pattern.
The lid is marked: AMERICAN STANDARD HAEMACYTOMETER / WITH/ LEVY COUNTING CHAMBER.
Signedon slide: MAX LEVY / PHILADELPHIA / U. S. A.
on rubber tube: MILLER
on pipettes: A. H. T. CO. PHILA.
on pipettes: A|GERMANY
Inscribedon lid of case: AMERICAN STANDARD HAEMACYTOMETER / WITH/ LEVY COUNTING CHAMBER
on slide: NEUBAUER / 1/400 sq mm.
on slide: B. S. No. 3494
on slide: Pat. Jan. 30 1917
scratched on slide: No. 25363
on rubber tube: 14FS / HO
on smaller pipette: 12441
on larger pipette: 11210
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.
ProvenanceDr. T. Green; gift of Mrs. T. Green in memory of her husband, 1992.
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
Spencer Lens Company
Date: 1945-1955
Accessories: box
Object number: 2003-1-0084a
Spencer Lens Company
Date: circa 1908
Accessories: oculars (2): 4x, 8x; Spencer objectives (3): 16, 4, 1.8 mm; blue filter; dark field stop; booklet; slides (4); box of cover slips; case; key.
Object number: 1323
John Cuthbertson
Date: 1770-1815
Accessories: brown storage box, descriptive tag, thin strip of paper in box with the inscription "lucernal microscope" in David P. Wheatland's handwriting (which refers to figs. 47-48 and 51 in this series), page from the book "Old Science and Medicine" with a photographic copy of the first print from this series, entitled "The Large Electric Machine at Haarlem."
Object number: 1998-1-1087
Date: 1890-1930
Object number: RS0528
Hoyt Electrical Instrument Works
Date: late 19th-mid 20th Century
Object number: RS0522
Date: 1890-1930
Object number: RS0505