The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this ArtJ.J. Harper, 1828 - 435 σελίδες |
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Σελίδα 7
... Semi - Circle Mensuration of An- 121 · 124 gles by these In- struments - The Protractor 2. Mensuration of heights - Of distances 3. Mensuration of Areas General Method Pennsylvania thod - 127 128 ples - Description of In- struments 232 ...
... Semi - Circle Mensuration of An- 121 · 124 gles by these In- struments - The Protractor 2. Mensuration of heights - Of distances 3. Mensuration of Areas General Method Pennsylvania thod - 127 128 ples - Description of In- struments 232 ...
Σελίδα 38
... semicircles ; and is double the radius , as AB or DE . fig . 8 . 16. 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 ...
... semicircles ; and is double the radius , as AB or DE . fig . 8 . 16. 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 ...
Σελίδα 39
... semicircle . * 19. A sector of a circle is a part thereof less than a semicircle , which is contained between two radii and an arc : thus the space contained between the two radii CH , CB , and the arc HB is a sec- tor , fig . 8 . 20 ...
... semicircle . * 19. A sector of a circle is a part thereof less than a semicircle , which is contained between two radii and an arc : thus the space contained between the two radii CH , CB , and the arc HB is a sec- tor , fig . 8 . 20 ...
Σελίδα 40
... semicircle is called the supple- ⚫ ment thereof : thus AH is the supplement of the arc HB . fig . 8 . 26. The sine , tangent , or secant of the complement of any arc , is called the co - sine , co - tangent , or co - secant of the arc ...
... semicircle is called the supple- ⚫ ment thereof : thus AH is the supplement of the arc HB . fig . 8 . 26. The sine , tangent , or secant of the complement of any arc , is called the co - sine , co - tangent , or co - secant of the arc ...
Σελίδα 47
... semicircle , is greater than a right angle , for since the arc AEC is greater than a semi- circle , its half , which is the measure of the angle ABC , must be greater than half a semicircle , that is , greater than a right angle . Fig ...
... semicircle , is greater than a right angle , for since the arc AEC is greater than a semi- circle , its half , which is the measure of the angle ABC , must be greater than half a semicircle , that is , greater than a right angle . Fig ...
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ABCD acres altitude Answer arch base bearing centre chains and links circle circumferentor Co-sec Co-tang column compasses contained cube root decimal difference of latitude Dist divided divisions divisor draw east Ecliptic edge EXAMPLE feet field-book figure four-pole chains given angle given number half the sum height Hence Horizon glass hypothenuse inches instrument length logarithm measure Meridian Altitude meridian distance method multiplied natural co-sine natural number natural sine Nonius number of degrees object observed off-sets opposite parallel parallelogram perches perpendicular plane prob PROBLEM proportional protractor Quadrant quotient radius rhombus right angles right line Secant sect semicircle Sextant side square root station subtract Sun's survey taken Tang tangent theo theodolite THEOREM trapezium triangle ABC trigonometry two-pole chains vane versed sine vulgar fraction whence