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 now in use: particularly, of a new theodolite ; Very convenient to be used by those who are resolved to be Accurate, as well as Expeditious. Together, With its Use in drawing the Perspective Appearance of a Gentleman's Seat. Also, the Use thereof in Levelling, Measuring Timber Standing; and, by a Sliding Rule improved, all Timbers, Shrubs, &c. Likewise, The Description and Use of an Universal Dial, whereby the Hour of the Day, Sun's Azimuth, Altitude, &c. with the Variation of the Compass, is readily observ'd, to the greatest Exactness. By John Hammond.