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
- Materials:
- nickel steel alloy
- Measurements:
-
overall: x 1146 mm x , 8 mm, .47kg
- credit:
- Agar Baugh, J H
