Conftruct the triangle with the three lines, draw the offsets and croffings, it will appear as in Plate 7, Fig. 1. Next measure the lines within the triangle, viz. EG. MQ. QS. SM. RB. CT. VD. and HX. The other lines run ftraight, and being croffed in two places need not be measured unless to prove the work.

The notes for the above eight lines will stand

When the foregoing lines are plotted, the offsets and croffings marked, the plan will appear as in Plate 7, Fig. 2. Draw the boundary lines and it will appear as in Plate 7, Fig. 3. Then measure the two lines which will complete the next largeft triangle Fd and DK.

The Notes will ftand thus: