Erratum

THE PRESIDENT and COUNCIL of the ROYAL SOCIETY adjudged, for the year 1791, two Medals on Sir GODFREY COPLEY's Donation; one to JAMES RENNEll, Esq. F.R.S. for his Paper on the Rate of Travelling as performed by Camels, printed in the last Volume of the Philosophical Transactions; the other to JOHN ANDREW DE LUC, Esq. F.R.S. for his Improvements in Hygrometry. ERRATUM. P. 68, l. 23. for $2,1446 - 60,08711$ read $2,14466 - 0,08711$.