A Treatise of Practical Surveying: Which is Demonstrated from Its First Principles. Wherein Every Thing that is Useful and Curious in that Art, is Fully Considered and Explained ... The Whole Illustrated with CopperplatesP. Wogan, 1795 - 319 sider |
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Side 10
... Chain of 50 Links ? 50 Answer Links 24.00 What is the Value of .2864 of a Shilling ? I 2 Pence 3.4368 4 Farthings 1.7472 What is the Value of .287 of a Pound Weight Troy ? Oz . dwt . grs . Answer 3. 8. 21 . What i What is the Value of ...
... Chain of 50 Links ? 50 Answer Links 24.00 What is the Value of .2864 of a Shilling ? I 2 Pence 3.4368 4 Farthings 1.7472 What is the Value of .287 of a Pound Weight Troy ? Oz . dwt . grs . Answer 3. 8. 21 . What i What is the Value of ...
Side 129
... Links ; ( and this is the most na- tural Division ) or by one of 50 Links , which con- tains two Poles or Perches : But because the Length of a Perch differs in many Places , therefore the Lengths of Chains and their respective Links ...
... Links ; ( and this is the most na- tural Division ) or by one of 50 Links , which con- tains two Poles or Perches : But because the Length of a Perch differs in many Places , therefore the Lengths of Chains and their respective Links ...
Side 130
... Links of a Four - Pole Chain , there is a large Ring , or fome- times a round Piece of Brafs fixed at every 10 Links ; and at 50 Links , or in the Middle , there are 2 large Rings . In fuch Chains as have a Brafs Piece at every 10 Links ...
... Links of a Four - Pole Chain , there is a large Ring , or fome- times a round Piece of Brafs fixed at every 10 Links ; and at 50 Links , or in the Middle , there are 2 large Rings . In fuch Chains as have a Brafs Piece at every 10 Links ...
Side 131
... Chain- man to govern the foremost one by , in order that the Distance may be ... Chain , in order to keep the foremost Man in a right Line ; and a Surveyor who has ... Links contained between the S 2 laft laft Peg , and the Object at the ...
... Chain- man to govern the foremost one by , in order that the Distance may be ... Chain , in order to keep the foremost Man in a right Line ; and a Surveyor who has ... Links contained between the S 2 laft laft Peg , and the Object at the ...
Side 132
... Links be annexed , the Distance Line required in Chains and Links is obtained , which must be registered in the Field - Book , as will hereafter be fhewn . If the Distance exceeds 10 , 20 , 30 , & c . Chains , when the Leader's Pegs are ...
... Links be annexed , the Distance Line required in Chains and Links is obtained , which must be registered in the Field - Book , as will hereafter be fhewn . If the Distance exceeds 10 , 20 , 30 , & c . Chains , when the Leader's Pegs are ...
Vanlige uttrykk og setninger
40 Perches ABCD Acres alfo alſo Anſwer Area Bafe Baſe Bearing becauſe bifect blank Line Cafe Center Chains and Links Chord Circle Circumferentor Co-fine Column confequently Cyphers Decimal defcribe Departure Divifion draw drawn Eaft eaſily Eaſt faid fame fecond Field-Book Figures fince firft Meridian firft Station firſt fmall Squares Four-Pole Chains ftationary Line fuch given half the Sum Inch Index infert Inftrument Interfection laft laid Latitude lefs Logarithm Mearing Meaſure Meridian Diſtance multiplied muſt Needle North obferve Off-fets oppofite parallel Parallelogram Perches Perpendicular Piece of Ground Plate Point Prob Protraction Protractor Quotient Radius refpective right Angles right Line Scale of equal SCHOLIUM Secant Sect Semicircle ſhall Side Sine South Square Root Sun's Survey taken Tangent thefe Theo Theodolite theſe thofe thoſe thro Trapezium Triangle ABC Trigonometry Two-Pole Chains uſed Variation Weft whofe
Populære avsnitt
Side 13 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees; and each degree into 60 minutes, each minute into 60 seconds, and so on.
Side 88 - 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.
Side 56 - ... logarithm of that number. EXAMPLE. • Required, the logarithm of 365. Answer, 2.56229. And though most tables of logarithms run but to 10000, yet by them the log. of any number not exceeding 10,000,000 may be found, and on the contrary, the number to any such logarithm, thus : 1 Find the log. of the first four figures of the given number 2. Take that log. from the log: of the number next following, and note their difference, 3. Multiply that difference by the remaining figures of the given number...
Side 91 - In the triangle ABC, there is given AB 240, the angle A 46° 30', and BC 200, to find the angle C, being acute, the angle B, and the side AC.
Side 89 - ED. that is as the sum of the two sides AB and BC, is to their difference ; so is the tangent of half the sum of the two unknown angles A and C, to the tangent of half their difference.
Side 32 - KCML, the sum of the two parallelograms or square BCMH ; therefore the sum of the squares on AB and AC is equal to the square on BC.
Side 19 - Four quantities are said to be in proportion when the product of the extremes is equal to that of the means, thus if A multiplied by D, be equal to B multiplied by C, then A is said to be to B as C is to D. POSTULATES OR PETITIONS. 1 . That a right line may be drawn from any one given point to another. 2. That a right line may be produced or continued at pleasure. 3. That from any centre and with any radius, the circumference of a circle may be described.
Side 13 - A chord is a right line drawn from one end of an arc or arch (that is, any part of the circumference of a circle) to the other ; and is the measure of the arc. Thus the right line HG, is the measure of the arc HBG.
Side 72 - ... these three proportions, for DE we put its equal be, for AE put ab, and for AD put ac, they will become AB : ab : : AC : ас, and AB : ab : : BC : be, and AC : ac : : BC : be.
Side 285 - Then if the true and magnetic amplitudes, be both north or both south, their difference is the variation ; but if one be north and the other south, their sum is the variation ; and to know whether it be easterly or westerly, suppose the observer looking...