Found in 12 Collections and/or Records:
Correspondence regarding the effects of magnetic variation on the mariner's compass, the use of magnetic variation to establish longitude and the cause of magnetic variation.
A notebook containing observations taken by Airy from a theodolite during the compass experiments on the iron ship 'Rainbow'. The folder also contains a scale.
Correspondence, computations and records of observations in regard to the correction of compasses on the iron ship 'Rainbow'. The correspondents include F. Baily, W.H. Barlow, W.H.M. Christie, W.T. Denison, G. Dollond, R. Fitzroy and W. Whewell. The papers include plans of the basin in Deptford Dockyard; 'graphical calculations of perturbations from assumed disturbing face of permanent magnets'; and observations of the dipping needle within and exterior to the ship.