Ex. 4. Required the content of a rectangular field, the length being 2000 links, breadth 1000 links of the Scots chain. Anf. 20 acres. Ex. 5. How many acres are in a fquare garden, whofe fide is 6 chain lengths English? Anf. 3 ac. 2 1o. 16 p. PROBLEM II. To reduce Scots acres into English, and vice verfa. RULE for English acres. As the fquare of 66 Is to the fquare of 74, So is any number of Scots acres To the number of English acres required. As the fquare of 74 Is to the fquare of 66, For Scots acres : So is any number of English acres To the number of Scots acres required. EXAMPLE I. How many English acres are in 14 acres, 3 roods Scots ? 255 Ex. 2. How many Scots acres are in 17 acres 3 roods EngAnf. 14 ac. o ro. 19 falls 4 ells. lith? Ex. 3. How many English acres are in 4co Scots? Anf. 502 ac. 3 ro. 19 p. 29 yds. PROBLEM III. To find the area of a triangular field. If the base and perpendicular are given, workby Problem 5. of surfaces; if the three fides are given, by Prob. 7. ; and if the two fides and the angle contained be given, by Prob. 6. EXAMPLE I. How many acres are in a triangular field whofe three fides are 5600, 700c, 4200 links of the English chain? Ex. 2. Required the area of a triangular garden, whose fide is 600, and the perpendicular falling upon it, from the oppofite angle, 756 links of the Scots chain. Ex. 3. How many acres are in a triangular field, whose two fides are 1900, and 1700 links of the English chain, and the angle contained between them 48° 13'? 1900 1700 1330000 1900 2)3230000 1615000 As Ex. 4. Required the area of a triangular field, whofe three fides are 600, 1000, 800 links of the Scots chain. Èx. Anf. 2 ac. i ro. 24 falls. x. 5. How many acres are in a triangular field, whose base is 1900 links, and perpendicular 1500 links of the English chain? Anf. 14 ac. I ro. Ex. 6. Required the area of a triangular field, whereof one of the angles is 54°, and containing fides 1400 and 1500 links of the Scots chain. Anf. 8 ac. I ro. 39 f. 7 ells. PROBLEM IV. To find the area of a field in the form of a trapezoid. See Prob lem 8. of furfaces. EXAMPLE I. Required the area of a trapozoid, whofe parallel fides are |