| RefNo | MA/20/5 |
| Previous numbers | MA.20 |
| Level | Item |
| Title | Note on comparisons of barometers at the Royal Society, by John David Roberton |
| Creator | Roberton; John David (fl.1820s-1840s); British assistant secretary of the Royal Society |
| Date | 1838 |
| Description | Ten pairs of observations of readings from the Royal Society's standard flint glass barometer, and Captain Alexander Henning's marine barometer.
Signed below: 'Jn D. Roberton'. [John David Roberton, Assistant Secretary]. |
| Extent | 1p. |
| Format | Manuscript |
| PhysicalDescription | Ink on paper |
| Dimensions | 236x138mm. |
| AccessStatus | Open |