# Jacob's staff

> calibrated wooden rod with sliding crosspiece used for measuring the altitude of celestial bodies or the height of distant objects

**Wikidata**: [Q843239](https://www.wikidata.org/wiki/Q843239)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Jacob's_staff)  
**Source**: https://4ort.xyz/entity/jacob-s-staff


## References

1. [Source](https://github.com/JohnMarkOckerbloom/ftl/blob/master/data/wikimap)
2. National Library of Israel