The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this ArtE. Duyckinck, 1811 - 508 σελίδες |
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Σελίδα 25
Containing All the Instructions Requisite for the Skilful Practice of this Art Robert Gibson. by A , and reserve the ... To this logarithm add the logarithm of the next less number , and the sum will be the logarithm of the number ...
Containing All the Instructions Requisite for the Skilful Practice of this Art Robert Gibson. by A , and reserve the ... To this logarithm add the logarithm of the next less number , and the sum will be the logarithm of the number ...
Σελίδα 43
... of any arc , is called tee gent , or co - secant of the arc itsek z 2 sine , DI the tangent , and C 1 arc DH : or they are the co - secant of the arc HB . fig .. 27. The sine of the sup • the same with the sine o = ing them according to ...
... of any arc , is called tee gent , or co - secant of the arc itsek z 2 sine , DI the tangent , and C 1 arc DH : or they are the co - secant of the arc HB . fig .. 27. The sine of the sup • the same with the sine o = ing them according to ...
Σελίδα 64
... To make a triangle of three given right lines BO , LB , LO , of which any two must be greater than the third . Lay BL from B to L ; from B with the line BO , describe an arc , and from L with LO describe ano- ther arc ; from O , the ...
... To make a triangle of three given right lines BO , LB , LO , of which any two must be greater than the third . Lay BL from B to L ; from B with the line BO , describe an arc , and from L with LO describe ano- ther arc ; from O , the ...
Σελίδα 77
Containing All the Instructions Requisite for the Skilful Practice of this Art Robert Gibson. steel . The difference a ... to be easy text z R. too fine and tapering , and get thering beer the compasses are stat As an instrumenti a mad at ...
Containing All the Instructions Requisite for the Skilful Practice of this Art Robert Gibson. steel . The difference a ... to be easy text z R. too fine and tapering , and get thering beer the compasses are stat As an instrumenti a mad at ...
Σελίδα 84
Containing All the Instructions Requisite for the Skilful Practice of this Art Robert Gibson. of the first term ; the parallel distance of the third term is the fourth proportional . Example . To find a fourth proportional to 8 , 4 , and ...
Containing All the Instructions Requisite for the Skilful Practice of this Art Robert Gibson. of the first term ; the parallel distance of the third term is the fourth proportional . Example . To find a fourth proportional to 8 , 4 , and ...
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Συχνά εμφανιζόμενοι όροι και φράσεις
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
Δημοφιλή αποσπάσματα
Σελίδα 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.
Σελίδα 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.
Σελίδα 197 - RULE. From half the sum of the three sides subtract each side severally.
Σελίδα 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.
Σελίδα 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.