| Reference number | MS/257/5/85 |
| Alternative reference number | Sa.1765 |
| Previous numbers | ES5/16/1765 |
| Level | Item |
| Title | Letter from John Welsh, 19 St John's Grove, Richmond to Edward Sabine |
| Date | 11 November 1858 |
| Description | Welsh was sorry to learn of Sabine’s ill health due to a cold and refers to his own ‘severe’ cough. Welsh has the R2 and R6 magnets which arrived on 12th February 1857 in a vibration apparatus along with a nine inch unifilar which is now at Rome. Welsh discusses the whereabouts of magnets and rings that he believes are still in Woolwich. Reference to Captain [Charles] Younghusband’s experiments on R2 and R6 magnets which Welsh suggests can be repeated [at Kew]. Condition of the magnets. Welsh sends a diagram [not enclosed] regarding the deflections of the dip needle by [Johann von] Lamont’s method and horizontal needle, discusses the ‘inductive action of the earth’ diminishing ‘the force of the magnet’. |
| Extent | 7p |
| Format | Manuscript |
| Physical description | Ink on paper |
| Access status | Open |
Fellows associated with this archive
| Code | Name | Dates |
| NA1680 | Welsh; John (1824 - 1859) | 1824 - 1859 |
| NA8279 | Sabine; Sir; Edward (1788 - 1883) | 1788 - 1883 |