Invar Rod, 1900-1912

Made:
1900-1912 in London
maker:
J H Agar
and
Charles Edouard Guillaume

Invar rod no. 8858, 45-inches long and 8 mm diameter, with N.P.L. certificate dated 7th May 1912 (mean coefficient of linear dilatation between the temperatures 0.6°C and 30°C is 0.0000000 per 1°C).

Details

Category:
Heat
Object Number:
1912-219
type:
standards (concepts)
taxonomy:
  • tools and equipment
  • associated concepts
credit:
Agar Baugh, J H