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Indicator Beads for Vernon-Harcourt Chloroform Vaporizer

preview image for Indicator Beads for Vernon-Harcourt Chloroform Vaporizer
Inventory Number: 10535
Object Type:
Accession Number: 1998-7
Brief Description: Red and blue glass beads for use with Vernon Harcourt. The beads both float below 16 degrees C, both sink above 18 degrees C. At the lower temperature the chloroform uptake is lower than indicated and vice versa.

Circular, transparent plastic box lined with cotton containing one red glass bead one blue glass bead, and a display label.

Invented in 1903 by Vernon-Harcourt, Augustus George.

See references.
Provenance: From the Nuffield Department of Anaesthetics, John Radcliffe Hospital.
Collection Group:
Material(s): Plastic
Height Width Depth Diameter Unit
16 93 mm


Image with multimedia irn 47432

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