Surveying Improv'd; Or, The Whole Art, Both in Theory and Practice, Fully Demonstrated: In Four Parts. I. Arithmetick, Vulgar and Decimal. II. All Definitions, Theorems, and Problems, with Plain Trigonometry. III. The Description and Use of Instruments. IV. How to Measure, Cast Up, Plot, Or Divide Any Parcel of Land,&c. With an Appendix Concerning Levelling, and Conveying Water to Any Possible Place Assign'd