Chapter V: GEOMETRICAL AND GRAPHICAL ESSAYS. This Work contains, 1. A select Set

of Geometrical Problems, many of which are new, and to be found in no other Work. 2. The Description and Use of those Mathematical Instruments that are usually put into a Case of Drawing Instruments. Besides these, there are also described several New and Useful Instruments for Geometrical Purposes. 3. A complete and concise System of SURVEYING, with an Account of some very essential Improvements in that useful Art. To which is added, a Description of the most improved THEODOLITES, PLANE TABLES, and other Instruments used in Surveying; and most accurate Methods of adjusting them. 4. The Methods of LEVELLING, for the Purpose of conveying Water from one Place to another; with a Description of the most improved Spirit Level. 5. A Course of PRACTICAL MILITARY GEOMETRY, as taught at Woolwich. 6. A short Essay on Perspective. The _Second Edition_, corrected, and enlarged with the Descriptions of several Instruments not contained in the former Edition, by W. JONES, Mathematical Instrument Maker; illustrated by thirty-five Copper-plates, in 2 vols. 8vo. Price 14s. in Boards.