Publisher's Synopsis
Excerpt from Machine Design, Vol. 1: Fastenings
Scientific analysis and the records of practice are both essential to success in the design of machine members, but neither alone is trustworthy. The former predicts only those stresses which pre vail under normal conditions and ignores the overload, the rough handling, or the slight accident which the machine may meet and against which it should not fail. Practical data, on the other hand, show only the proportions which constructors have given in specific cases of stress and service and empirical formulae founded upon them may give results wide of the mark, if the inherent limitations of these formula be exceeded. The problem of design is one whose many elements vary continually in num ber, character, and magnitude, and, for its solution, theoretical analysis, precedent, and the ripened judgment of the designer are required.
Elsewhere acknowledgment has been made of the courtesy of the many officials and companies who have furnished information.
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