| RefNo | MS/603/3/66 |
| Previous numbers | 465 |
| Level | Item |
| Title | Letter from Geo Fras [George Francis] Fitzgerald, Trinity College, Dublin, to [Joseph] Larmor |
| Creator | FitzGerald; George Francis (1851-1901); Irish theoretical physicist |
| Recipient | Larmor; Sir Joseph (1857-1942); Irish theoretical physicist |
| Date | 18 January 1895 |
| Description | Fitzgerald commences by querying why Larmor believes that current is not guided by conduction currents in surfaces or coatings, asking what evidence Larmor has. He thinks there is no rule for calculating the thickness of a surface involved in 'slpipping along'. Fitzgerald supposes that Larmor has calculated resistance and has foud it to be greater than allowable fro known damping of vibrations. He continues to discuss surface conduction, referring to [Vilhelm] Bjerkness and others. Larmor's paper received queries on why magnetci actions differ from vortices. Fitzgerald gives an example of a flat circular disc moving in a fluid, with a small sketch, concluding that if a perfectly conducting circuit moved in a magnetic field, Larmor's force would fail; there would be no force in this element. He debates how Larmor might possibly get out of his difficulties, concluding that 'any system which brings out that a constrant current is in any way affected by a constant current in a closed solenoid in its neighbourhood is almost certainly wrong'. Larmor must account for energy which will accumulate somewhere in the case raised by Fitzgerald. |
| Extent | 8p. |
| Format | Manuscript |
| PhysicalDescription | Ink on paper |
| AccessStatus | Open |