10 The engraved Fac-fimile of a Field-Book to be 75, Laft line but two, for divide into read divide it into. 84, Instead of 4600 in the 7th line from bottom, and 5800 the 4th line from the bottom, read (10400,) which is the fum of the former two numbers. 105, The line BC in the second Diagram, fhould be numbered 875 inftead of 900. 119, Second line, for 15 Perches read 16 Perches. 121, Third line, a comma fhould follow long inftead of links. ... 123, At the bottom of the Diagram, for oo read (500.) 126, Second line, for zò read (200.) .. 128, Tenth line, for 406 AE read 404-AE. CONTENT S. PROB. Definitions in Geometry.. Problems in Geometry. I. To divide a given line into two equal Parts . II. To erect a Perpendicular from a given Point in a given right Line... Another method, when the point is at the end Another method when the point is nearly Another Method.. PAGE. 1 14 14 15 16 17 18 19 IV. To divide a given Angle into two equal parts 19 V. To divide a right Angle into three equal parts. VI. To make an Angle equal to a given Angle... VII. To divide a given Line into any number of equal parts. .... VIII. To draw a line parallel to a given Line which IX. To draw a line parallel to a given line at a X. Upon a given right line to make an equilateral Triangle. XI. To make a Triangle whofe three fides fhall be equal to three given ftraight lines, if any two of the Atraight lines are greater 20 21 22 22 23. 2-4 breadth fhall be equal to two given lines. 28 XV. To find the centre of a given Circle.... XVI. Through three given points to defcribe the circumference of a Circle... XVII. To draw a Tangent to a given Circle XX. To inferibe a Square in a given Circle.. XXI. To infcribe a Pentagon in a given Circle. XXII. To infcribe an Hexagon in a given Circle XXIII. To infcribe an Heptagon in a given XXIV. To infcribe an Octagon in a given Circle. XXV. To infcribe a Nonagon in a given Circle. XXVIII. To defcribe a Circle about a given Triangle. 40 XXIX. To defcribe a Circle about a given Square. PROB. 1 PAGE. XXXIV. To draw an Heptagon, whofe fides Shall be equal to a given Line..... 109 109 115 Rules for parting off given portions of Fields, in form When the fences are at Right Angles. When the fences are not at right Angles. When there are Offsets on the given Line. When there are Offsets on the given line, and on Directions for Surveying and Planning a small Farm. 186 |