Freezing microtome, London, England, 1883-1885

Made:
1883-1885 in London
maker:
James Swift and Son Limited
modifier:
W. Fearnley
and
J. W. Groves

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Freezing mictotome, Grover's second modification of Williams' design, by Swift, London, c. 1883. Graduated black
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Freezing mictotome, Fearnley's modification of Grover-Williams ' design, by Swift, London, c. 1883

Invented in 1881, this type of freezing microtome used ice and salt to freeze animal and plant specimens to be sliced for microscope slides. Ice and salt were replaced by a removable ether spray in 1883. Freezing hardened and preserved the specimens’ structure quickly. Chemical preservation usually took six weeks but by using ether the process took a matter of seconds. Once frozen, a razor, operated by hand and secured by a tripod, moved across the top of specimen, creating slices. The slices were then mounted, stained and studied under the microscope by histologists. The knife and tubing is missing.

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Details

Category:
Microbiology
Object Number:
A627272
Materials:
ebony, glass, mahogany, metal, rubber, wood
type:
freezing microtome
taxonomy:
  • furnishing and equipment
  • tools & equipment
  • surgical equipment
  • surgical instrument
  • surgical knife
status:
Loan: Wellcome Trust

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