Louis Pasteur’s compound microscope

Made:
1857-1865 in Paris
maker:
Nachet and Son
Compound monocular microscope. Graduated grey background. Compound monocular microscope, by Nachet and Son, in case, 1861-1870, supposedly belonged to Pasteur. Louis Pasteur

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Compound monocular microscope. Graduated grey background.
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Compound monocular microscope, by Nachet and Son, in case, 1861-1870, supposedly belonged to Pasteur. Louis Pasteur
Science Museum Group
© The Board of Trustees of the Science Museum, London.

Compound monocular microscope used by Louis Pasteur

Louis Pasteur (1822-1895), the French chemist and microbiologist, used microscopes like this compound microscope during his experiments on spontaneous generation. By 1864, Pasteur disproved this theory by experimenting with fermentation. He placed yeast water in a swan-necked flask that only allowed air to enter. The water remained clear. Only when the flask was open to dust and micro-organisms did fermentation occur. The microscope was made by Nachet et fils.

Details

Category:
Microscopy (Wellcome)
Object Number:
A55114 Pt1
Materials:
base, iron, cast, enamelled, very dark green, body tube suport, brass, body tube, brass, lenses, glass, limb, brass, pillar, brass and stage, brass, blackened
type:
compound microscope
taxonomy:
  • furnishing and equipment
  • tools & equipment
  • optical instrument
  • microscope
  • furnishing and equipment
  • tools & equipment
  • optical instrument
  • microscope
credit:
Loan, Wellcome Trust