Excerpt from Appendices to Various Nautical Almanacs: Between the Years 1834 and 1854 Such are the simple and neat modifications in the formation of these four Tables of corrections, recently used by the late Mr. Henry jenkins, in computing the times of the transits of the shadows over the disc of Jupiter, which he applied however on the supposition of the semiduration of the transit being the same as that of the eclipse. The computation of the time of this semiduration is afforded by the same Tables which are given for those of the occultation and transit. In taking out the component parts of the number N we have merely to form the arguments with the heliocentric longi tude of Jupiter, and to neglect 6' and its correction, as we have before observed. We must also remark, that the time of the middle of a transit of a satellite, or the time of its inferior geocentric conjunction, is to be determined from the mean of the preceding and following geocentric conjunctions with the application of the same cor rection as that used for the transit of the shadow. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This 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.