This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1850 Excerpt: ...Mr. Turner was not prepared for the exhibition of such a surplus amount of strength, as had been proved to exist, under the peculiar mode of testing to which it had been subjected. After Mr. Locke had satisfied himself as to the general stability of the roof, and had made such observations as were necessary, to establish his views of the mode of strengthening certain parts, he proceeded to make further experiments, for the puposes of scientific research, and the result was the production of a roof, which Mr. Turner believed was hitherto unequalled for stability and strength, and he was so confident of the correctness of the principle, that with his present practical experience, he should not hesitate to undertake the construction of roofs of almost any extent, within the limits...