Excerpt from Report on the Preparations For, and Observations Of, the Transit of Venus: As Seen at Roorkee and Lahore on December 8, 1874 It will be seen that I have departed in one point from sir george airy's instructions. I have left all the equations with seconds of space' as a unit, instead of taking the last step, and making the unit a second of observed time. In all the calculations connected with the observations near contact, I have felt that except in the contacts themselves, the pro bable error of observed time was of no importance, and that that of space alone affected the result in the case of the alt-azimuth Observations of course it was the errors in space which were sought. Though I had at one time intended also exhibiting these results here as proposed b sir G. Airy, I have finally left them, for uniformity, as they stand in my papers. 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.