# John Hadley

> English mathematician and astronomer; (1682-1744)

**Wikidata**: [Q445128](https://www.wikidata.org/wiki/Q445128)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/John_Hadley)  
**Source**: https://4ort.xyz/entity/john-hadley


## References

1. Complete Dictionary of Scientific Biography
2. MacTutor History of Mathematics archive
3. Integrated Authority File
4. Enciclopedia universal ilustrada europeo-americana
5. [Houten octant gemerkt 'Kweekschool 1785'. 1785](https://n2t.net/ark:/33862/collect/601575)
6. International Standard Name Identifier
7. Virtual International Authority File
8. [Source](https://catalogues.royalsociety.org/CalmView/Record.aspx?src=CalmView.Persons&id=NA7954&pos=1)
9. [John Hadley. Encyclopædia Britannica Online](https://www.britannica.com/biography/John-Hadley)
10. SNAC
11. Freebase Data Dumps. 2013
12. CERL Thesaurus
13. Shakeosphere
14. catalogo.beniculturali.it