A Treatise On Surveying
A Treatise On Surveying
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In our eReader you can find the full English version of the book. Read A Treatise On Surveying Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book A Treatise On Surveying
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Example, — To construct a vertical dial for a place in latitude 31** 30', Here, the angular distances of the hour lines from noon will be : — For I p.m. or II a.m. — tan / = cos 31° 30' + tan 15'' 12° 52' = tan 12° 52' (nearly) For 2 p.m. or ID a.m. — tan / = cos 31° 30' + tan 30** 26° 12' = tan 26° 12' For 3 p.m. or 9 a.m. — tan / = cos 31° 30' + tan 45** 40° 27' = tan 40° 27' and so on.
The angle formed by the gnomon with the vertical face of the dial will, of course, be 58° 30' = co-latitude....
In a horizontal and vertical dial, the dtvation of the style is respectively equal to the latitude and co-latitude of the place, for in fig. 72, showing a horizontal dial, P C N is the latitude, and in fig. 73, showing a vertical dial, P C N is the co-latitude.
The inclination of the plane of an oblique dial to the horizon (or plane of a horizontal dial), is called its incUnatiorty and its inclination to the prime vertical its declination.
In this manner a dial constructed for one place may be used at another.
What to read after A Treatise On Surveying?
You can find similar books in the "Read Also" column, or choose other free books by Middleton, Reginald Empson, 1844-1925 to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Example, — To construct a vertical dial for a place in latitude 31** 30', Here, the angular distances of the hour lines from noon will be : — For I p.m. or II a.m. — tan / = cos 31° 30' + tan 15'' 12° 52' = tan 12° 52' (nearly) For 2 p.m. or ID a.m. — tan / = cos 31° 30' + tan 30** 26° 12' = tan 26° 12' For 3 p.m. or 9 a.m. — tan / = cos 31° 30' + tan 45** 40° 27' = tan 40° 27' and so on.
The angle formed by the gnomon with the vertical face of the dial will, of course, be 58° 30' = co-latitude....
In a horizontal and vertical dial, the dtvation of the style is respectively equal to the latitude and co-latitude of the place, for in fig. 72, showing a horizontal dial, P C N is the latitude, and in fig. 73, showing a vertical dial, P C N is the co-latitude.
The inclination of the plane of an oblique dial to the horizon (or plane of a horizontal dial), is called its incUnatiorty and its inclination to the prime vertical its declination.
In this manner a dial constructed for one place may be used at another.
What to read after A Treatise On Surveying?
You can find similar books in the "Read Also" column, or choose other free books by Middleton, Reginald Empson, 1844-1925 to read onlineMoreLess
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