A Treatise on Practical Surveying: Which is Demonstrated from Its First Principles : Wherein Every Thing that is Useful and Curious in that Art, is Fully Considered and ExplainedF. Lucas, jun. and Cushing & Jewett, J. Robinson printer, 1822 - 326 páginas |
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Página 147
... four poles or perches , which consist of 100 links ; ( and this is the most natural division ) or by one of 50 links ... pole chain is 11 yards , and the four - pole one is 22 yards hence the length of a link in a statute - chain is 7.92 ...
... four poles or perches , which consist of 100 links ; ( and this is the most natural division ) or by one of 50 links ... pole chain is 11 yards , and the four - pole one is 22 yards hence the length of a link in a statute - chain is 7.92 ...
Página 148
... four- pole chain , there is a large ring , or sometimes a round piece of brass fixed at every 10 links ; and at 50 links , or in the middle , there are two large rings . In such chains as have a brass piece at every 10 links there is ...
... four- pole chain , there is a large ring , or sometimes a round piece of brass fixed at every 10 links ; and at 50 links , or in the middle , there are two large rings . In such chains as have a brass piece at every 10 links there is ...
Página 153
... four - pole , 160 two - pole chains , or 320 perches , make a mile as before ; and if roads are mea- sured by a statute chain , it will give you the miles English , but if by a plantation chain , the 20 OF THE CHAIN 153 Certain regular ...
... four - pole , 160 two - pole chains , or 320 perches , make a mile as before ; and if roads are mea- sured by a statute chain , it will give you the miles English , but if by a plantation chain , the 20 OF THE CHAIN 153 Certain regular ...
Página 154
... four - pole , and others by a two pole chain ; and as ground for houses is measured by feet , we will shew how to reduce one to the other , in the following problems . PROB . I. To reduce two - pole chains and links to four - pole ones ...
... four - pole , and others by a two pole chain ; and as ground for houses is measured by feet , we will shew how to reduce one to the other , in the following problems . PROB . I. To reduce two - pole chains and links to four - pole ones ...
Página 155
... four - pole chains , how many two pole ones ? 2 16 37 Ch . L. 2. In 8 . 82 of four - pole chains , how many two- 2 50 pole ones ? 17. 32 Answer . PROB . III . To reduce four - pole chains and links , to perches and decimals of a perch . The ...
... four - pole chains , how many two pole ones ? 2 16 37 Ch . L. 2. In 8 . 82 of four - pole chains , how many two- 2 50 pole ones ? 17. 32 Answer . PROB . III . To reduce four - pole chains and links , to perches and decimals of a perch . The ...
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Términos y frases comunes
20 perches ABCD acres altitude Answer base bearing blank line centre chains and links chord circle circumferentor Co-secant co-sine Co-tang column compass contained cyphers decimal decimal fraction difference Dist divided divisor draw east edge EXAMPLE feet field-book figures four-pole chains given angle half the sum height Hence hypothenuse inches instrument latitude length logarithm measure meridian distance multiplied needle number of degrees object off-sets opposite parallel parallelogram perpendicular piece of ground plane polygon Portmarnock PROB proportion protractor quotient radius right angles right line scale of equal SCHOLIUM secant second station sect semicircle side sights sine square root stationary distance stationary line sun's suppose survey taken tang tangent thence theo theodolite THEOREM thro triangle ABC trigonometry true amplitude true azimuth two-pole chains vane variation whence