An Account of the Mode Proposed to be Followed in Determining the Relative Situation of the Royal Observatories of Greenwich and Paris. By Major-General William Roy, F. R. S. and A. S.
An Account of the Trigonometrical Operation, Whereby the Distance between the Meridians of the Royal Observatories of Greenwich and Paris Has Been Determined. By Major-General William Roy, F. R. S. and A. S.
Experiments and Observations Made in Britain, in Order to Obtain a Rule for Measuring Heights with the Barometer. By Colonel William Roy. F. R. S.