This Handbook is intended to supply both the practicing engineer and the student with a
reference work which is authoritative in character and which covers the field of mechanical
engineering in a comprehensive manner. It is no longer possible for a single individual or a
small group of individuals to have so intimate an acquaintance with any major division of
engineering as is necessary if critical judgment is to be exercised in the statement of current
practice and the selection of engineering data. Only by the cooperation of a considerable
number of specialists is it possible to obtain the desirable degree of reliability. This Handbook
represents the work of fifty specialists.