Geographical Surveying Its Uses Methods And Results
The book Geographical Surveying Its Uses Methods And Results was written by author Frank De Yeaux Carpenter Here you can read free online of Geographical Surveying Its Uses Methods And Results book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Geographical Surveying Its Uses Methods And Results a good or bad book?
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Since the horary variations are constantly changing with altitude, country and cli- 125 mate, it is important to have as frequent determinations of them as can practicably be made, so that no very great distance may intervene between the place where a table of horary corrections is construct- ed and the place where it is used. For a similar reason it may be deemed necessary to establish and sustain a sec- ond meteorological reference station, if the field of the season's survey should be a wide... one, or if it should vary greatly in the atmospherical condition of differ- ent portions of its area. No comprehen- sive rule can be given to govern the num- ber of these reference stations; all must depend upon the judgment of the direc- tor of the survey, and the resources at his command. In general, the farther the place of an observation from its reference station, the less reliable will be its result. But, as an exception, let us take the example of a broad inland plain, separated from the sea and its influences by a wall of mountains, within which, upon the plain, the reference station is situated.
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