In measuring a line which has offsets on the left fide, note them down in the left column of the Field-book; if they are on the right side, note them in the right column.

In measuring from A to B the notes will stand

In measuring from A to C the notes will stand

1

Draw a Plan, and find the area of a Field, from

In furveying a Farm or Lordship confifting of feveral Fields, it is customary to draw a plan of the whole, and then compute the content of each piece feparately, by drawing fresh lines to divide them into Trapeziums and Triangles, the bases and perpendiculars of which, must be accurately measured by the fcale they were plotted from ; in doing which, many of the crooked lines may be reduced to straight ones, by applying a straight piece of lantern-horn to the crooked line in fuch a manner, that the fmall parts cut off from the crooked figure by it, may be equal to thofe which