The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this Art |
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... Secants 20 2. Mensuration of Natural Sines 71 heights 179 Points of the Compass 6. Changing the scale of Maps -Of Distances 194 3. Mensuration of Areas 200 General Method 232 Pennsylvania Method 246 4. Of Off - sets 5. Method of ...
... Secants 20 2. Mensuration of Natural Sines 71 heights 179 Points of the Compass 6. Changing the scale of Maps -Of Distances 194 3. Mensuration of Areas 200 General Method 232 Pennsylvania Method 246 4. Of Off - sets 5. Method of ...
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... Secants 20 Natural Sines heights 179 Of Distances 194 3. Mensuration of Areas 200 General Method 232 Pennsylvania Method 246 4. Of off - sets 5. Method of surveying by Intersections 257 6. Changing the scale of Maps Mean Refraction ...
... Secants 20 Natural Sines heights 179 Of Distances 194 3. Mensuration of Areas 200 General Method 232 Pennsylvania Method 246 4. Of off - sets 5. Method of surveying by Intersections 257 6. Changing the scale of Maps Mean Refraction ...
Page 41
... secant of the are HB . fig . 8 . 24. What an arc wants of a quadrant is called the complement thereot : Thus DH is ... secant of the com- plement of any arc , is called the co - sine , co tan- gent , or co - secant of the arc itself ...
... secant of the are HB . fig . 8 . 24. What an arc wants of a quadrant is called the complement thereot : Thus DH is ... secant of the com- plement of any arc , is called the co - sine , co tan- gent , or co - secant of the arc itself ...
Page 43
... 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 demais self - same line ; thus H1 fis ar ...
... 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 demais self - same line ; thus H1 fis ar ...
Page 62
... secant , and CI its co - secant . Fig . 8 . 1. The co - sine of an arc is to the sine , as the ra- dius is to the tangent . 2. The radius is to the tangent of an arc 62 GEOMETRICAL.
... secant , and CI its co - secant . Fig . 8 . 1. The co - sine of an arc is to the sine , as the ra- dius is to the tangent . 2. The radius is to the tangent of an arc 62 GEOMETRICAL.
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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.