On the alleged correspondence of the rainfall at Madras with the sun-spot period , (reprinted from the Proceedings of the Royal Society, No.181, 1877).
On the computation of the harmonic components of a series representing a phenomenon recurring in daily and yearly periods (from the Proceedings of the Royal Society, Vol.42).
Annual addresses on the progress of geography from 1886-7 to 1888-9 , (reprinted from the Proceedings of the Royal Geographical Society and monthly record of geography).
Lectures on geography delivered before the University of Cambridge in 1888 , (from Proceedings of the Royal Geographical Society and Monthly Record of Geography).