The new art of surveying by the goniometer [electronic resource] : containing, I. A new method of measuring angles by this new instrumentwith much greater Exactness than can be done by a Plain-Table or Theodolite; which is at the same Time more Simple, Portable, and less Expensive. II. The description and use of a new protractor, Double Parallel-Ruler, Pantagraph, and other Instruments used in Plotting off, and Copying Surveys in any Size. III. The rationale of reducing any multangular figure to a plain triangle, and thereby finding the Contents of a Survey by one single Computation. IV The principles of levellingin Theory and Practice concisely explained. The whole illustrated by a great variety of copper-plate figures. By Benj. Martin.