| Reference number | EL/H3/125 |
| Level | Item |
| Title | Letter, from John Conrad Francis de Hatzfeld to the Royal Society, dated at London |
| Creator | Hatzfeld; John Conrad Francis von (fl 1723-1725) |
| Date | 28 July 1725 |
| Description | Sends another example of his wheel for perpetual motion (with figure) |
| Language | English |
| Extent | 1p |
| Format | Manuscript |
| Place origin | London, England |
| Origin coordinates | 51.50853, -0.12574 |
| Digital images | View item on Science in the Making |
| Access status | Open |
| Related material | See EL/H3/126 for explanation |
| URL description | Also available on Early Modern Letters Online |
| URL | http://emlo.bodleian.ox.ac.uk/profile/work/1ce50daf-640b-43cc-a51e-dd7ff62164bd |