Excerpt from The Messenger of Mathematics, Vol. 15: May, 1885 April, 1886 It is convenient, however, to first consider, in a more general form, the values of these seven quantities and the relations between them. The consideration of these more general functions will form the subject of the next five sections. 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.