photograph, Gravimeters
- Made:
- 1876
Gravimeters invented by J.W. Brown. Image SME Nos. 103/104*; 1876 Catalogue No. 421D. NB: one sheet depicts two items.
Gravimeters invented by J.W. Brown. Image SME Nos. 103/104*; 1876 Catalogue No. 421D. NB: one sheet depicts two items.