A Treatise on Surveying,: Containing the Theory and Practice: : to which is Prefixed a Perspicuous System of Plane Trigonometry. : The Whole Clearly Demonstrated and Illustrated by a Large Number of Appropriate Examples. : Particularly Adapted to the Use of SchoolsKimber and Sharpless, no. 93, Market Street, and John Richardson, no. 244, Market Street., 1820 - 206 páginas |
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Página 81
... acre . When the land is uneven or hilly , a four - pole chain is too long to be convenient , and the measures cannot be taken with it as accurately as with one that is shorter . Surveyors therefore generally make use of a chain that is ...
... acre . When the land is uneven or hilly , a four - pole chain is too long to be convenient , and the measures cannot be taken with it as accurately as with one that is shorter . Surveyors therefore generally make use of a chain that is ...
Página 82
... four - pole chains and links , to perches and deci- mals of a perch . RULE . Multiply the chains and links by 4. Thus 13.64 four- To reduce square four - pole chains to acres . pole chains = 54.56 perches . 82 MEASURING LAND .
... four - pole chains and links , to perches and deci- mals of a perch . RULE . Multiply the chains and links by 4. Thus 13.64 four- To reduce square four - pole chains to acres . pole chains = 54.56 perches . 82 MEASURING LAND .
Página 83
... acres . RULE . Divide by 10 , and the quotient will be acres . If there be decimals in the quotient , multiply by 4 and by 40 to obtain the roods and perches . EXAMPLE . In 523.2791 square chains , how many acres ? 10 ) 523.2791 ...
... acres . RULE . Divide by 10 , and the quotient will be acres . If there be decimals in the quotient , multiply by 4 and by 40 to obtain the roods and perches . EXAMPLE . In 523.2791 square chains , how many acres ? 10 ) 523.2791 ...
Página 94
... Acres = 61A . 2R . 2. What is the area of a triangular field whose sides measure 10.64 , 12.28 and 9.00 chains ? Ans . 4A . 2R . 26P . 3. What quantity of land is contained in a triangle , the sides of which are 20 , 30 and 40 chains ...
... Acres = 61A . 2R . 2. What is the area of a triangular field whose sides measure 10.64 , 12.28 and 9.00 chains ? Ans . 4A . 2R . 26P . 3. What quantity of land is contained in a triangle , the sides of which are 20 , 30 and 40 chains ...
Página 103
... this rule is too abstruse to admit of a place in this work . The student who wishes to see a demonstration is re- ferred to treatises on Mensuration or Fluxions . EXAMPLES . 1. How many acres are in a circle MEASURING LAND . 103.
... this rule is too abstruse to admit of a place in this work . The student who wishes to see a demonstration is re- ferred to treatises on Mensuration or Fluxions . EXAMPLES . 1. How many acres are in a circle MEASURING LAND . 103.
Términos y frases comunes
ABCD ABFD acres adjacent adjacent angles angle ABC angle opposite angled triangle azimuth base bearing and distance breadth Calculation centre Co-secant Secant Co-sine Co-tang column decimal degrees DEMONSTRATION departure corresponding diff difference of latitude Dist divide division line draw equal EXAMPLES feet figures find the angle find the area four-pole chains fourth term given angle given area given bearing given ratio given side John Gummere Lat Dep latitude and departure length logarithm measured meridian distance natural number off-sets parallel parallelogram perches perpendicular perpendicular BC quired quotient radius rectangle remainder Required the area right angle right line right-angled triangle RULE semiperimeter side AB side AC sine square root station stationary line subtract tance Tang Tangent tract of land trapezium trapezoid triangle ABC trigonometry