The practical surveyor [electronic resource] : shewing, ready and certain methods for measuring, mapping and adorning all sorts of lands and waters, by the several instruments used for this purpose: Particularly, Of a New Theodolite; Very convenient to be used by those who are resolved to be Accurate, as well as Expeditious. Together with The Use of the same Theodolite, in drawing the Perspective Appearance of a Gentleman's Seat, without Measuring one Single Length, at one setting down of the Instrument, the Picture having any given Position. Also, Its Use in Levelling, Measuring Timber Standing; and, by a Sliding Rule improved, all Timbers, Shrubs, &c. Extracted from the Works of the most Experienced Artists, by John Hammond.