Half-hours with the Telescope; Being a Popular Guide to the Use of the Telescope as a Means of Amusement and Instruction.Richard A ProctorHäftad204 kr
treatise on the Cycloid and all forms of Cycloidal Curves and on the use of such curves in dealing with the motions of planets, comets, &c. and of matter projected from the sunRichard A ProctorHäftad265 kr
