Principal Triangulation. Plate XXII. Contours of the round in the vicinity of Dunnose: for the determination of the influence of local attraction on the observed latitudes. (to accompany) (V. 2: plates) Ordnance Trigonometrical Survey. Account of Principal Triangulation. Plates. (with) (V.1: text) Ordnance trigonometrical survey of Great Britain and Ireland : Account of the observations and calculations of the principal triangulation ... London: Printed by George Edward Eyre, and William Spottiswoode. Printers to the Queens most excellent Majesty. 1858.
