I have several times been asked if there was any book on clock making, which, without being encumbered with professional details, would enable a person having a moderate knowledge of mechanical principles to understand the construction of clocks, and the things which chiefly require attention in their making and management. I believe there is no such book. Perhaps the articles in some of the Encyclopædias might partly answer the purpose; but they are neither accessible to the great majority of readers, nor do they contain some information which may be expected in a rudimentary treatise, though they do contain interesting accounts of some curious inventions, which would be out of place in a merely practical book such as this professes to be.