A Treatise on Mine-surveying |
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Results 1-5 of 89
Page ix
... length , Angular measures , Trigonometrical formulæ , CHAPTER II . PAGE 1 1 3 5 6 789 THE MEASUREMENT OF DISTANCES . Methods of measuring , 11 11 ( a . ) The chain , 13 Offsets , Chaining on slopes , Obstacles to measurement , Surveying ...
... length , Angular measures , Trigonometrical formulæ , CHAPTER II . PAGE 1 1 3 5 6 789 THE MEASUREMENT OF DISTANCES . Methods of measuring , 11 11 ( a . ) The chain , 13 Offsets , Chaining on slopes , Obstacles to measurement , Surveying ...
Page 7
... Length . - The standard measure of length in the United Kingdom is the yard . In addition to the yard , the fol- lowing units of length are used for surveying purposes : — The inch , one thirty - sixth part of the standard yard . The ...
... Length . - The standard measure of length in the United Kingdom is the yard . In addition to the yard , the fol- lowing units of length are used for surveying purposes : — The inch , one thirty - sixth part of the standard yard . The ...
Page 8
... length ( 0-513074 toise ) was termed the metre , and was adopted as the French unit of length . In 1799 , two similar rods of platinum were constructed as standards , having that length at 0 ° centigrade . The given length of the metre ...
... length ( 0-513074 toise ) was termed the metre , and was adopted as the French unit of length . In 1799 , two similar rods of platinum were constructed as standards , having that length at 0 ° centigrade . The given length of the metre ...
Page 11
... length ; 80 chains being equal to 1 mile . This length was chosen by the inventor , Edmund Gunter , in 1620 , with the object of facilitating the computation of areas ; 10 square chains being equal to 1 acre . The chain is composed of ...
... length ; 80 chains being equal to 1 mile . This length was chosen by the inventor , Edmund Gunter , in 1620 , with the object of facilitating the computation of areas ; 10 square chains being equal to 1 acre . The chain is composed of ...
Page 12
... length of the chain , but also the length of every ten links . Standard 66 - feet and 100 - feet chains have been fixed by the Government in Trafalgar Square and Guildhall , for the use of surveyors in London . For rough colliery ...
... length of the chain , but also the length of every ten links . Standard 66 - feet and 100 - feet chains have been fixed by the Government in Trafalgar Square and Guildhall , for the use of surveyors in London . For rough colliery ...
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Common terms and phrases
accuracy accurate adjusted back-sight base-line bearing bore-hole brass calculated centre chain City Guilds clamped clinometer coal colliery collimation coloured compass contour lines cord corner cosec cotan cross-wires curve determined direction distance employed equal error fathoms feet fixed fore-sight glass graduated ground height hole horizontal circle inches inches in diameter inclination instrument intersection latitude length line of sight lode magnetic bearing magnetic meridian magnetic-needle marked means measured method metres mine-surveying miner's dial mines needle observations obtained offsets Ordnance Survey parallel parallel ruler perpendicular placed plane planimeter plate plotting plumb-bob plumb-line plummet position protractor represents right angles safety-lamp scale seam shaft side spirit-level square staff station station-line strike and dip surface surface-surveys survey tacheometer tacheometry tangent screw telescope theodolite transit-theodolite traverse triangle tripod tube underground vernier vernier-plate vertical angles wire yards
Popular passages
Page 17 - A Pocketbook of Electrical Rules and Tables for the use of Electricians and Engineers.
Page 16 - TABLE, in place of the usual Fifteen minute computations required. This alone is evidence of the assistance which the Tables ensure to every user, and as every Surveyor in active practice has felt the want of such assistance FEW KNOWING OF THEIR PUBLICATION WILL REMAIN WITHOUT THEM.
Page 25 - Contains the pith of what has been written by the best scholars on the subject. The notes comprise everything that the student can want.
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