Elementary text book for young surveyors and levellersSimpkin, Marshall & Company, 1856 - 185 sider |
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Resultat 1-5 av 28
Side vii
... carefully studies them , cannot help becoming master of the subject - he will certainly have nothing to unlearn , should he afterwards follow it professionally . It seems almost unnecessary to offer any apology for writing a work of ...
... carefully studies them , cannot help becoming master of the subject - he will certainly have nothing to unlearn , should he afterwards follow it professionally . It seems almost unnecessary to offer any apology for writing a work of ...
Side 30
... carefully with these flags , of which there should be at least three to every long line , let one assistant take the lead , who is called the leader , having the ten pins and the chain - handle in his left hand , and proceed toward the ...
... carefully with these flags , of which there should be at least three to every long line , let one assistant take the lead , who is called the leader , having the ten pins and the chain - handle in his left hand , and proceed toward the ...
Side 31
... carefully complying with the directions above , and has put his first arrow down , he must return the cry of " down " to the driver , and , taking the chain up in his right hand , must proceed onward until the driver , coming to the ...
... carefully complying with the directions above , and has put his first arrow down , he must return the cry of " down " to the driver , and , taking the chain up in his right hand , must proceed onward until the driver , coming to the ...
Side 35
... careful to make the field book , as much as possible , a fac - simile of the ground itself , with every post , hedge , house , & c . , placed on the book , as to the central column , considered always as a line , in the same position as ...
... careful to make the field book , as much as possible , a fac - simile of the ground itself , with every post , hedge , house , & c . , placed on the book , as to the central column , considered always as a line , in the same position as ...
Side 38
... carefully selected the point b , it will only be re- quisite , in measuring along AC , to observe where a right angle from ( b ) would fall upon AC , note in the field book 250 ; leave a mark in the ground , and continue the measure ...
... carefully selected the point b , it will only be re- quisite , in measuring along AC , to observe where a right angle from ( b ) would fall upon AC , note in the field book 250 ; leave a mark in the ground , and continue the measure ...
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Elementary Text Book for Young Surveyors and Levellers with Copious Field ... Henry James Castle Ingen forhåndsvisning tilgjengelig - 2019 |
Elementary Text Book for Young Surveyors and Levellers With Copious Field ... Henry James Castle Ingen forhåndsvisning tilgjengelig - 2019 |
Vanlige uttrykk og setninger
2nd gate A. R. P. Answer angle of bearing angle of elevation base line bisect broad arrow centre chain surveying chains 50 links CHAP CHECK ANGLES check line circle circumferentor clamp corner correct cross customary determined diagonal DIAGRAM distance ditch divided draw equal Euclid EXAMPLE fence field book field notes flag gate post given angle given line given point half degrees hedge height horizontal inch interior angles intersection join Lancashire length line AC long scale mark meridian line motion needle number of degrees object observation offsets perpendicular placed plot pond protractor Required the true right angles right-angled triangle river road roods round screws similar triangles spirit level square chains square feet statute acres statute measure taken telescope theodolite top of bank trapezium triangle ABC true bearing true north vertical whole instrument width Wiltshire Wood
Populære avsnitt
Side 111 - All the interior angles of any rectilineal figure, together with four right angles, are equal to twice as many right angles as the figure has sides.
Side 160 - LEVELLING is the art of representing the inequalities of the earth's surface, and of determining the relative heights of any number of points above or below a line, equidistant, at every point, from the centre of the earth.
Side 17 - The square of the hypothenuse is equal to the sum of the squares of the other two sides ; as, 5033 402+302.
Side 8 - To describe a square upon a given straight line. Let AB be the given straight line : it is required to describe a square upon AB.
Side 102 - The existence of parallax is determined by moving the eye about, when looking through the telescope, observing whether the cross wires change their position, and are flittering and undefined. To correct this error, first adjust the eye-piece, by means of the moveable eye-piece tube, till you can perceive the cross wire clearly defined, and sharply marked against any white object.
Side 23 - C will be found 9, the square root on D. For the square root of 144 : Set 1 on C to 10 on D ; then against 144 on C will be found the square root 12 on D. 42. To find the area of a board or plank : The rule is, to multiply the length by the breadth, the product will be the area ; therefore, by the sliding rule, Set 12 on B against the breadth in inches on A ; then...
Side 16 - E, the adjacent angles CEA, AED; these angles are together equal to two right angles. (i. 13.) Again, because the straight line DE makes with AB...
Side 28 - To find the area of a circle. Rule — Multiply the square of the diameter by .7854; or the square of the radius by 3.1416; or the square of the circumference by .07958. Find the area of a piston 20 in. in diam. Answer— 20!
Side 8 - To draw a straight line at right angles to a given straight line, from a given point in the same. Let AB be the given straight line, and C the given point in it : it is required to draw from the point C a straight line at right angles to AB.
Side 23 - To find the Area of a Triangle when the Three Sides are given. Rule. — From half the sum of the three sides subtract each side separately. Multiply the half sum and the three remainders together, and extract the square root of the product.