Letter from Antoine [Thomson] d'Abbadie, Paris to Edward Sabine Abbadie discusses his bad health, and consequently unable to answer Sabine’s letter from 23rd May. Abbadie thanks Sabine for Sir [James] South’s experiments on the tremors occasioned by the passage of trains. Discussion on the South’s experiment and its contradiction to Professor Bruhn’s view that in the Leipzig observatory, 600 yards from a railway, no disturbance can be caused by this. Abbadie intends to test this theory if his health permits. Abbadie thanks Sabine for the results of magnetic declination obtained at Port Kennedy 1864. Abbadie asks Sabine to comment on the new arrangement of the barometrical tables prepared by [Rodolphe] Radau for Abbadie’s publication of his physical observations. Abbadie has been named secretary for the new Association for astronomy and meteorology, but may have to decline this appointment. 16 July 1864