Excerpt from Experimental Investigations by the State Board of Health of Massachusetts, Upon the Purification of Sewage by Filtration and by Chemical Precipitation, and Upon the Intermittent Filtration of Water: Made at Lawrence, Mass., 1888-1890, Part II. Of Report on Water Supply and SewerageOutside of the building, in the field, where the surface of the ground is seven and one-half feet above the top of the measuring basins, are ten large wooden tanks, sunk their full depth into the ground, one opposite each of the measuring basins.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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.