Opacity tubes, England 1915-1925

PART OF:
Three sets of opacity tubes, England, 1915-1925
Made:
1915-1925

Opacity tubes, England 1915-1925

Opacity tubes were used to standardise anti-bacterial vaccines from 1915 onwards. The opaque appearance of a vaccine of unknown concentration is compared to a standard tube of known concentration. A light is shone through the unknown tube and is compared to each of the ten standard glass tubes in the kit to determine which one it matches most closely. Provided with the kit is a list of how much bacteria per millimetre is in each tube for certain types of bacteria.

Details

Category:
Public Health & Hygiene
Object Number:
2010-94/1
type:
tubes

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