Excerpt from Journal of the College of Engineering, Imperial University of Tokyo, Vol. 5: May 27th, 1910 The problem in them is, for simplicity sake, limited to the vertical vibrations of hull, that is, the lateral vibrations about a horizontal plane, (but of course similar reasoning applies to the horizontal vibrations for a first approximation, although a ship is generally devoid of symmetry in this latter case). On this understanding, I consider a ship as a tree-free bar symmetrical about the centre line plane and treat her as subjected to forced vibrations under the influence of unbalanced forces of engines (both main and auxiliary) and propellers, but not taking, account of wave effects of the surrounding water. 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.