Excerpt from Second Annual Report of the Board of Public Works to the Common Council of the City of Chicago: April 1st, 1863 The proposed aqueduct will be circular in form, twelve feet in diameter, and covered, the top of it being several feet below the level of the lake. The pumping machinery can be arranged to pump both from the lake into the river, and from the river into the lake. It is believed that the water to be forced through this canal, will keep sufficiently pure all of the main river, and all of the South Branch between the main river and North street. The North Branch and that part of the South Branch south of North street, may not be materially benefited by it. If it is found to work well, a similar construction can afterwards be made for flushing out the North Branch. 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.