CH 40.a
- Name:
- Length Standards
- Date:
- Unknown
- Dimensions (H x W x D, cm):
- 0.0 x 0.0 x 0.0
- Associated Lecturer/s
-
Henry Joseph Grayson
Ernst Johannes Hartung
Thomas Ranken Lyle
a. Length standards, used by Grayson in his grating work. Standardised 1916