507-mechanical-movements-mechanisms-and-devices-pdf

Owing to the selection of these movements at such intervals as could be
snatched from professional duties, which admitted of no postponement, and to
the engravings having been made from time to time for immediate publication,
the classification of the movements is not as perfect as the compiler could have
desired; yet it is believed that this deficiency is more than compensated for by
the copiousness of the Index and the entirely novel arrangement of the