The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this ArtE. Duyckinck, 1811 - 508 من الصفحات |
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الصفحة 14
... feet in a [ yard . 2.0625 12number of inches [ in a foot . .7500 12 number of lines in 9.0000 [ an inch . The answer here is 2 feet 9 lines . What is the value of .084 of a furlong ? per . 1 yd . 2 ft . 11 in . Ans . 3 What is the value ...
... feet in a [ yard . 2.0625 12number of inches [ in a foot . .7500 12 number of lines in 9.0000 [ an inch . The answer here is 2 feet 9 lines . What is the value of .084 of a furlong ? per . 1 yd . 2 ft . 11 in . Ans . 3 What is the value ...
الصفحة 76
... feet all that can be performed with the shortest ones , while , at the same time , they are better adapt- ed to large work . OF DRAWING COMPASSES . Compasses are made either of silver or brass , but with steel points . The joints should ...
... feet all that can be performed with the shortest ones , while , at the same time , they are better adapt- ed to large work . OF DRAWING COMPASSES . Compasses are made either of silver or brass , but with steel points . The joints should ...
الصفحة 80
... feet long , when opened to its greatest extent . In describing the lines usually placed on this inst ument , I refer to those commonly laid down on the best six - inch brass sectors . But as the principles are the same in all , and the ...
... feet long , when opened to its greatest extent . In describing the lines usually placed on this inst ument , I refer to those commonly laid down on the best six - inch brass sectors . But as the principles are the same in all , and the ...
الصفحة 86
... feet transversely to the scale concern- ed , and slide the feet along till they both rest on like divisions on both legs ; then will those divisions shew the degrees and parts corresponding to the given line . To find the length of a ...
... feet transversely to the scale concern- ed , and slide the feet along till they both rest on like divisions on both legs ; then will those divisions shew the degrees and parts corresponding to the given line . To find the length of a ...
الصفحة 88
... feet , & c . each part on the scale answering to one foot , one yard , & c . and the plan will be larger or smaller , as the scale contains a smaller or a great- er number of parts in an inch . Hence a variety of scales is useful to lay ...
... feet , & c . each part on the scale answering to one foot , one yard , & c . and the plan will be larger or smaller , as the scale contains a smaller or a great- er number of parts in an inch . Hence a variety of scales is useful to lay ...
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عبارات ومصطلحات مألوفة
acres altitude Answer arch azimuth base bearing blank line centre chains and links chord circle circumferentor Co-sec Co-tang column compasses contained decimal difference distance line divided divisions draw east Ecliptic edge feet field-book figures fore four-pole chains geom given number half the sum Horizon glass hypothenuse inches instrument Lat Dep Lat latitude length logarithm measure meridian distance multiplied natural co-sine natural sine needle Nonius number of degrees object observed off-sets opposite parallel parallelogram pegs perches perpendicular plane pole pole star Portmarnock PROB protractor Quadrant quotient radius right angles right line scale of equal SCHOLIUM screw Secant sect Sextant side sights square station stationary distance subtract Sun's survey taken Tang tangent theo theodolite trapezium triangle ABC trigonometry two-pole chains vane versed sine vulgar fraction whence
مقاطع مشهورة
الصفحة 38 - The angle in a semicircle is a right angle ; the angle in a segment greater than a semicircle is less than a right angle ; and the angle in a segment less than a semicircle is greater than a right angle.
الصفحة 25 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; and each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds ; and these into thirds, &c.
الصفحة 197 - RULE. From half the sum of the three sides subtract each side severally.
الصفحة 106 - C' (89) (90) (91) (92) (93) 112. In any plane triangle, the sum of any two sides is to their difference as the tangent of half the sum of the opposite angles is to the tangent of half their difference.
الصفحة 27 - The VERSED SINE of an arc is that part of the diameter which is between the sine and the arc. Thus BA is the versed sine of the arc AG.