Date of Award


Document Type


Degree Name

Bachelor of Science


Mechanical Engineering and Mechanics


Modern engineering and mechanical construction demand other and better knowledge of materials than the old chemical and physical tests afford and of all the new modes of examination metallography has proved most efficient and most useful, and at the present time it is finding constantly enlarging utilization in the industries. As is well known, it is a method of testing which proceeds by examining microscopically a highly polished metal surface that has been submitted to the action of some reagent. By this operation the diverse constituents are differentiated, some being attacked, while others are not. In well-equipped European shops it is possible with the modern apparatus for this work to execute microscopic examination of this kind very rapidly, as a specimen can be polished, etched, and photographed in about twenty minutes.