Excerpt from How to Keep the Clock Right by Observations of the Fixed Stars With a Small Telescope: Together With Tables of Stars Arranged to Show, by the Use of a Little Arithmetic, the Mean Solar Time of Their Apparent Transits, to the End of the CenturyThe 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.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.