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How to Keep the Clock Right by Observations of the Fixed Stars With a Small Telescope
Excerpt from How to Keep the Clock Right by Observations of the Fixed Stars With a Small Telescope
The second class consists of observations on the meridian. This class must, however, be subdivided into two divisions; the first, when the observations are made with good transit instruments, which are occasionally examined for errors, and of which the errors are known and allowed for. The observa tions by such instruments are the most perfect of any  but the instruments are costly; they require and deserve careful treatment, and trouble and skill are necessary in detecting the errors.
The second class consists of observations on the meridian. This class must, however, be subdivided into two divisions; the first, when the observations are made with good transit instruments, which are occasionally examined for errors, and of which the errors are known and allowed for. The observa tions by such instruments are the most perfect of any  but the instruments are costly; they require and deserve careful treatment, and trouble and skill are necessary in detecting the errors.
84 pages, Paperback
First published September 12, 2011
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