Principles of geometry, mensuration, trigonometry, land-surveying, and levelling, with their application to the solution of practical problems in estimation, surveying and railway engineering |
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Page xi
... Heights and Distances MENSURATION OF SURFACES . Problems MENSURATION OF SOLIDS . Problems Irregular Solids . Railway Cuttings , & c . Specific Gravity . Tonnage of Vessels PRINCIPLES OF ESTIMATION LAND SURVEYING SURVEYING WITH THE ...
... Heights and Distances MENSURATION OF SURFACES . Problems MENSURATION OF SOLIDS . Problems Irregular Solids . Railway Cuttings , & c . Specific Gravity . Tonnage of Vessels PRINCIPLES OF ESTIMATION LAND SURVEYING SURVEYING WITH THE ...
Page 11
... height CD is 8 ft . , and the half breadth AD of the tie- beam is 8.5 ft .; required the length of the rafter AC . Ans . 11.6 ft . A D B Ans . AC 9.2 A D B D C 6. Wishing to know the distance between two objects . D and c inaccessible ...
... height CD is 8 ft . , and the half breadth AD of the tie- beam is 8.5 ft .; required the length of the rafter AC . Ans . 11.6 ft . A D B Ans . AC 9.2 A D B D C 6. Wishing to know the distance between two objects . D and c inaccessible ...
Page 15
... height of a tower DC . measures from the bottom D of the tower the hori- zontal line DB = 400 ft .; he then places his theo- dolite at B , and takes the angle CBD ( = 40 ° ) , which the top of the tower makes with the level line BD ...
... height of a tower DC . measures from the bottom D of the tower the hori- zontal line DB = 400 ft .; he then places his theo- dolite at B , and takes the angle CBD ( = 40 ° ) , which the top of the tower makes with the level line BD ...
Page 16
... height , as required , = 64 ft . 5. To find the height of a tower CB standing upon a hill AB . The sur- veyor measured in the same straight line BD = 50 ft . , and DA = = 75 ft .; he then found the CDB = 41 ° , ite and 24 ° . CAB = D ...
... height , as required , = 64 ft . 5. To find the height of a tower CB standing upon a hill AB . The sur- veyor measured in the same straight line BD = 50 ft . , and DA = = 75 ft .; he then found the CDB = 41 ° , ite and 24 ° . CAB = D ...
Page 34
... height ; hence we have the following rule for finding the area of a parallelogram . Rule . Multiply the linear units in the base by the linear units in the perpendicular , and the product will be the square units in the surface of the ...
... height ; hence we have the following rule for finding the area of a parallelogram . Rule . Multiply the linear units in the base by the linear units in the perpendicular , and the product will be the square units in the surface of the ...
Common terms and phrases
ABCD base bisect breadth centre chain-line chains chord circum circumference cone construct convex surface cosine cubic cubic foot curve cutting cylinder describe diagonal diameter dicular distance divided draw equilateral triangle feet field-book figure find the area foot formula frustum given point hence hypotenuse inches inscribed isosceles triangle join labour length let fall logarithm measured miles Multiply number of degrees parallel parallelogram perpen perpendicular height plane polygon prism PROBLEM protractor pyramid radius rectangle regular polygon Required the area Required the cost Required the solidity right angles right-angled triangle scale of equal sector similar triangles sine slant height sphere square station straight line tangent theodolite THEOREM thickness trapezium trapezoid triangle ABC Trigonometry vernier
Popular passages
Page 143 - From half the sum of the three sides, subtract each side severally; multiply the half sum, and the three remainders together, and the square root of the product will be the area required. Example. — Required the area of a triangle, whose sides are 50, 40, and 30 feet. 50 + 40+30 ; — 60, half the sum of the three sides.
Page 66 - The perimeters of two regular polygons of the same number of sides, are to each other as their homologous sides, and their areas are to each other as the squares of those sides (Prop.
Page 170 - RULE. To the sum of the areas of the two ends add four times the area of a section parallel to and equally distant from both ends ; multiply this sum by the perpendicular height, and J of the product will be the solidity.
Page 167 - To find t/ie solidity of a cone, or pyramid. — RULE. — Multiply the area of the base by the perpendicular height, and one-third of the product will be the content To find the solidity of the frustum of a cone.
Page 37 - Multiply the sum of the two parallel sides by the perpendicular distance between them, and half the product will be the area.
Page 146 - To find the area of a trapezoid. RULE. Multiply half the sum of the two parallel sides "by the perpendicular distance between them : the product will be the area.
Page 164 - To find the solidity of a cylinder. RULE. — Multiply the area of the base by the altitude, and the product will be the solidity.
Page 169 - To twice the length of the base add the length of the edge ; multiply the sum by the breadth of the base, and by one-sixth of the height.
Page 110 - I label the two new points e and /." FIG. 2 With the help of this figure he then proceeds to the usual proof of the theorem that the area of a parallelogram is equal to the product of the base by the altitude, establishing the equality of certain lines and angles and the congruence of the pair of triangles.