Excerpt from Journal of the Franklin Institute of the State of Pennsylvania, Vol. 6: And American Repertory of Mechanical and Physical Science, Civil Engineering, the Arts and Manufactures, and of American and Other Patented InventionsBut Vauban is still more explicit in the instructions with which he accompanied his general profile, wherein he says: This profile is accommodated to various heights of walls, is proportioned with ref erence to the weight of earth which they have to retain, and has been tested in the building of more than four million cubic yards toises cubes) of masonry, at 150 different fortresses a phrase which evidently proves that this same profile was not simply the result ofa long practice, but rather the consequence of rules and principles which must have preceded its application in military constructions.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.