CHAP. XX. How to take the plot of a Field at one station taken in any angle thereof, from whence all the other angles may be seen, by the Plain Table.
PLace your Table in some convenient angle in the Field to be measured, and turn it about till the Needle hang di∣rectly over the Meridian line in the Card, and there fix it: then draw a line parallel to the side of your Table, as NS, in which line assigne any point at pleasure, as H, which shall represent your station or place of standing, unto this point ap∣ply the Index, and direct the sights to A and draw a line upon your paper as HA; and measure the distance HA (as was directed be∣fore in Chap. 16.) Then direct the sights to B, your second mark, and there likewise draw a line HB, measuring the distance HB, as was taught in the forementioned Chapter.
In like manner direct the sights to C D E F and G, drawing lines by the side of your Index at every observation, and measure with your Chain the distance from H (the place where your Instrument standeth) to the severall angles of the Field A, B, C, D, E, F, and G; which distances being taken in your Compasses, from any Scale, and set upon your Table from H upon the several lines HA, HB, HC, HD, HE, HF, and HG, so shall you have upon your Table the points A, B, C, D, E, F, and G, by which marks draw the lines HA, AB, BC, CD, DE, EF, FG, and GH, which lines will include the exact figure of the Field upon your Table.