Identificatie
referentie code
Add. MS a/200/107
Titel
Letter from George Airy
Datum(s)
- 29 Nov. 1854 (Vervaardig)
Beschrijvingsniveau
Stuk
Omvang en medium
2 pp.
Context
Naam van de archiefvormer
archiefbewaarplaats
Geschiedenis van het archief
Directe bron van verwerving of overbrenging
Inhoud en structuur
Bereik en inhoud
Royal Observatory Greenwich - GA's 'people have brought up the pendulum-calculations to the final stage, and the result is - 1. The pendulums have stood so well as to give very great confidence in the accuracy of result. 2. The gravity at the bottom of the mine (reputed 1260 feet) is greater than at the top by 1/19190 part...This gives density nearly = 2.7 x density of coal measures, which is more than I expected'.