Meteorological observations at Toronto, Canada, by Charles James Buchanan Riddell and Charles Wright Younghusband Monthly meteorological data sheets, in two parts: form 1 containing uncorrected meteorological observations, form 2 corrected meteorological results. Completed by Royal Artillery officers in Toronto. The 1840 observations were made by C.J.B. Riddell, and from January 1841 C.W. Younghusband, although signatures on the forms cease from July 1841. Each sheet is inscribed: 'Published by Richard & John E. Taylor, Red Lion Court, Fleet Street, London.'; and lower right: 'J. Basire sc.' January 1840-August 1842