The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this Art |
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... Latitude by the Meridian Al- titude of the Sun 316 4. Variation of the Com- pass S18 The Semicircle 164 Mensuration of An- LIST OF TABLES . gles by these In . struments 169 Logarithms of Numbers 1 The Protractor , 171 Sines , Tangents ...
... Latitude by the Meridian Al- titude of the Sun 316 4. Variation of the Com- pass S18 The Semicircle 164 Mensuration of An- LIST OF TABLES . gles by these In . struments 169 Logarithms of Numbers 1 The Protractor , 171 Sines , Tangents ...
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... Latitude by the Meridian Al- titude of the Sun 315 4. Variation of the Com- 305 159 pass 918 The Semicircle 164 Mensuration of An- LIST OF TABLES . gles by these In- struments 169 The Protractor , 171 2. Mensuration of Logarithms of ...
... Latitude by the Meridian Al- titude of the Sun 315 4. Variation of the Com- 305 159 pass 918 The Semicircle 164 Mensuration of An- LIST OF TABLES . gles by these In- struments 169 The Protractor , 171 2. Mensuration of Logarithms of ...
Page 1
... Latitude , Longitude and soundings , together with the bearings of their most remarkable places from each other , it is usually denominated Mari- time - Surveying . This branch of Surveying , how- ever , demands no other qualifications ...
... Latitude , Longitude and soundings , together with the bearings of their most remarkable places from each other , it is usually denominated Mari- time - Surveying . This branch of Surveying , how- ever , demands no other qualifications ...
Page 81
... latitudes . 3. A line of hours . 4. A line of inclination of meridians . 5. A line of chords . On the other face , three logarithmic scales , namely , one of numbers , one of sines , and one of tangents ; these are used when the sector ...
... latitudes . 3. A line of hours . 4. A line of inclination of meridians . 5. A line of chords . On the other face , three logarithmic scales , namely , one of numbers , one of sines , and one of tangents ; these are used when the sector ...
Page 87
... sines end . There are two other scales , namely , the rhumbs , marked RU . and longitudes , marked LON . Scales of latitude and hours are sometimes put upon the plain scale ; but , as dialling is now but seldom DRAWING INSTRUMENTS . 87.
... sines end . There are two other scales , namely , the rhumbs , marked RU . and longitudes , marked LON . Scales of latitude and hours are sometimes put upon the plain scale ; but , as dialling is now but seldom DRAWING INSTRUMENTS . 87.
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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.