When the Fences are not straight, obferve the following directions. If they have regular curves as A B, proceed in a ftraight line from A to B, and every 40 or 50 yards take the distance from the straight line to the fence, as 5, 14, &c. these are called Offsets. offset down twice, except the first and laft, which fet down once, add them together, and multiply by the straight line, divide the product by the number of offsets fet down, the quotient will be the content in yards, let this be added to the area of the triangles and divide by 4840, &c. NOTE. The foregoing Rule will do very well for rough calculations, but a more correct one, though not fo expeditious, is given in Part the Third. 200 14 B 1 |