| Screw Pitch | 1 mm, 0.5 mm |
|---|
Optics
Spherometer
Brass dial head 40 mm diameter, divided and marked in 100 divisions. Vertical scale of 10-0-10 mm. Fitted on heavy brass disc, with 3 pointed legs, the distance between legs 40 mm.
Brass dial head 40 mm diameter, divided and marked in 100 divisions. Vertical scale of 10-0-10 mm. Fitted on heavy brass disc, with 3 pointed legs, the distance between legs 40 mm.
| Screw Pitch | 1 mm, 0.5 mm |
|---|