The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skillful Practice of this ArtE. Duyckinck, 1821 - 544 σελίδες |
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Σελίδα
... columns , and by that means delivered to posterity . It is a matter of some wonder , that though Surveying appears to have been the first , or at least one of the first of the Ma- thematical sciences , that the rest have met with much ...
... columns , and by that means delivered to posterity . It is a matter of some wonder , that though Surveying appears to have been the first , or at least one of the first of the Ma- thematical sciences , that the rest have met with much ...
Σελίδα 4
... column , or vertical line , by themselves . Then , beginning at the right hand column of figures , add in the same manner as in whole num- bers , and put the decimal point , in the sum di- rectly beneath the other points . EXAMPLES ...
... column , or vertical line , by themselves . Then , beginning at the right hand column of figures , add in the same manner as in whole num- bers , and put the decimal point , in the sum di- rectly beneath the other points . EXAMPLES ...
Σελίδα 30
... column by themselves . By employing this process , the ope- ration is considerably abbreviated . EXAMPLE 2 . Required the Logarithm of the number 3 . Here the next less number is 2 ; and 3 + 2 = 5 = - A , and A2 = 25 . 5 ) 0.868588964 ...
... column by themselves . By employing this process , the ope- ration is considerably abbreviated . EXAMPLE 2 . Required the Logarithm of the number 3 . Here the next less number is 2 ; and 3 + 2 = 5 = - A , and A2 = 25 . 5 ) 0.868588964 ...
Σελίδα 157
... column under the deno- mination of angles , in a line with station No. 1 ; and in the same line , under the title of distances , in the third column , let the measure of the line AB in chains and links be inserted . Being now arrived at ...
... column under the deno- mination of angles , in a line with station No. 1 ; and in the same line , under the title of distances , in the third column , let the measure of the line AB in chains and links be inserted . Being now arrived at ...
Σελίδα 160
... column of the radii : the measures of the respective lines of the mear- ing , viz . AB , BC , CD , DE , & c . being placed in the third column of distances , will complete the field - book . Thus , No. Radii Distan . Ch L Ch . L ...
... column of the radii : the measures of the respective lines of the mear- ing , viz . AB , BC , CD , DE , & c . being placed in the third column of distances , will complete the field - book . Thus , No. Radii Distan . Ch L Ch . L ...
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Συχνά εμφανιζόμενοι όροι και φράσεις
ABCD acres altitude Answer arch base bearing centre chains and links circle circumferentor Co-sec Co-tang column compasses contained cube root decimal diagonal difference of latitude Dist divided divisions divisor draw east Ecliptic edge EXAMPLE feet field-book figure four-pole chains geometrical series given angle given number half the sum height Hence Horizon glass hypothenuse inches instrument length Logarithms measure meridian distance multiplied Natural Co-sines natural number natural sine Nonius number of degrees object observed off-sets opposite parallelogram perches perpendicular plane pole PROB proportional protractor Quadrant quotient radius rhombus right angles right line screw Secant sect semicircle side square root station subtract survey taken tance Tang tangent theo theodolite trapezium triangle ABC trigonometry two-pole chains vane versed sine vulgar fraction whence
Δημοφιλή αποσπάσματα
Σελίδα 246 - ... that triangles on the same base and between the same parallels are equal...
Σελίδα 58 - 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.
Σελίδα 231 - RULE. From half the sum of the three sides subtract each side severally.
Σελίδα 45 - 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.
Σελίδα 14 - Then multiply the second and third terms together, and divide the product by the first term: the quotient will be the fourth term, or answer.
Σελίδα 5 - His method is founded on these three considerations: 1st, that the sum of the logarithms of any two numbers is the logarithm of the product of...
Σελίδα 91 - ... scale. Given the length of the sine, tangent, or secant of any degrees, to find the length of the radius to that sine, tangent, or secant.
Σελίδα 35 - DIVISION BY LOGARITHMS. RULE. From the logarithm of the dividend subtract the logarithm of the divisor, and the number answering to the remainder will be the quotient required.
Σελίδα 30 - Then, because the sum of the logarithms of numbers, gives the logarithm of their product ; and the difference of the logarithms, gives the logarithm of the quotient of the numbers ; from the above two logarithms, and the logarithm of 10, which is 1, we may obtain a great many logarithms, as in the following examples : EXAMPLE 3.
Σελίδα 211 - At 170 feet distance from the bottom of a tower, the angle of its elevation was found to be 52° 30' : required the altitude of the tower ? Ans.