The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this Art |
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Page 4
... manner as in whole num- bers , and put the decimal point , in the sum di- rectly beneath the other points . EXAMPLES . Add 4.7832 3.2543 7.8251 6.03 2.857 and 3.251 together . Place them thus , 4.7832 3.2543 7.8251 6.03 2.857 3.251 Sum ...
... manner as in whole num- bers , and put the decimal point , in the sum di- rectly beneath the other points . EXAMPLES . Add 4.7832 3.2543 7.8251 6.03 2.857 and 3.251 together . Place them thus , 4.7832 3.2543 7.8251 6.03 2.857 3.251 Sum ...
Page 13
... manner through all the parts of the integer , and the seve- ral denominations , standing on the left hand , are the value required . EXAMPLES . Required the value of .3375 of an acre . 4 number of roods in [ an acre . 1.3500 40 = number ...
... manner through all the parts of the integer , and the seve- ral denominations , standing on the left hand , are the value required . EXAMPLES . Required the value of .3375 of an acre . 4 number of roods in [ an acre . 1.3500 40 = number ...
Page 18
... manner of a quotient figure in division . Subtract the square , thus found , from the said period , and to the remainder annex the two figures of the next following period , for a dividend . Double the root above mentioned for a divisor ...
... manner of a quotient figure in division . Subtract the square , thus found , from the said period , and to the remainder annex the two figures of the next following period , for a dividend . Double the root above mentioned for a divisor ...
Page 25
... manner in which Napier's logarithm of 10 is found , may be seen in most books of Algebra , but it is here omitted , because students of Surveying are too generally unacquainted with the principles of that science , and the subject is ...
... manner in which Napier's logarithm of 10 is found , may be seen in most books of Algebra , but it is here omitted , because students of Surveying are too generally unacquainted with the principles of that science , and the subject is ...
Page 26
... manner in which the division is here carried on , may be readily perceived by dividing , in the first place , the given decimal by A , and the suc- ceeding quotients by A2 ; then letting these quo- tients remain in their situation , as ...
... manner in which the division is here carried on , may be readily perceived by dividing , in the first place , the given decimal by A , and the suc- ceeding quotients by A2 ; then letting these quo- tients remain in their situation , as ...
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Common terms and phrases
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
Popular passages
Page 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.
Page 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.
Page 197 - RULE. From half the sum of the three sides subtract each side severally.
Page 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.
Page 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.