Jacob's staff
Sign in to saveAlso known as cross-staff, ballastella, fore-staff, balestilha
calibrated wooden rod with sliding crosspiece used for measuring the altitude of celestial bodies or the height of distant objects
Wikidata facts
- Subclass of
- astronomical instrument
- Named after
- Jacob
- Image
- Jakobsstab 1rhb.jpg
Show 5 more facts
- used by
- navigation
- discoverer or inventor
- Q1372350
- time of earliest written record
- 1342-00-00
- Commons category
- Jacob's staff
- time of discovery or invention
- 1350-00-00
Sources (2)
via Wikidata · CC0