144 7 he Description of

or Ruler, be about two Foot long, andof the s^me Breadth and Thicknesswith the Indices A b and A d r and divi-ded after the same Manner as they are,only the Tenths are to be drawn crossthe inner Edge as well as nroL the in-ner Third of the Breadth , and theInches are to bemarfe’d x. 2. 3.4. &)V.from C to 7 *, and Y, making CT eigh-teen In she?, and CY six. The like Di-visions are to be made on the Side ofthe Square KX, beginning at the in-ner Edge of the Brass Ruler at K y mark-ing the full Inches on the upper Side 1,2. 3. 4, &i\ to 24, the Tenths are tobe drawn cross the upper Third andthe upper Edge, Let this Instrument befixt upon Feet with a Ball and Socketlike those of a common surveying In-strument,but stronger in order to keepit very firm; and let there be Sightswhich may, as Occasion require, befixt on the Diameter, Indices and RulesTY , of the sameKind with those os the

Surveying