The Computation of the Transits of Venus for the Years 1874 and 1882, and of Mercury for the Year 1878, for the Earth Generally and for Several Places in Canada, With a Popular Discussion of the Sun's Distance from the Earth

The Computation of the Transits of Venus for the Years 1874 and 1882, and of Mercury for the Year 1878, for the Earth Generally and for Several Places in Canada, With a Popular Discussion of the Sun's Distance from the Earth