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(1.) Taking underground observations with the dial,
Taking vertical angles,
Keeping the dialling-book,
(2.) Surface-surveys with the miner's dial,
(3.) Colliery-surveys with the miner's dial,
CHAPTER IV.
THE VARIATION OF THE MAGNETIC-NEEDLE.
3. Determination of the meridian by means of the Pole star,
4. Determination of the meridian by means of a map,
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Setting out the meridian line,
Inclination of the magnetic-needle,
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CHAPTER V.
SURVEYING WITH THE MAGNETIC-NEEDLE IN THE PRESENCE OF IRON.
Surveying with the hanging-compass in the presence of iron,
CHAPTER VIII.
THE THEODOLITE.
Historical sketch,
Description of the theodolite,.
The telescope,.
Various forms.—(a.) Hoskold's transit-theodolite,
(b.) The Everest theodolite,
(c.) The Hoffman tripod head,
(d.) American theodolites,
(e.) Traveller's transit-theodolite,
Adjustments of the theodolite,
Measuring horizontal angles,
Repetition,
Measurement of vertical angles,
The solar attachment, .