In short, I would always be understood to write my Papers of Criticism in the Spirit which Horace has expressed in those two famous Lines; Si quid novisti rectius istis, Candidus imperti; si non, his utere mecum, If you have made any better Remarks of your own, communicate them with Candour; if not, make use of these I present you with.

To these are superadded the usual contents of a pocket book, so as to render the present volume a desirable vade-mecum for the operative, the manufacturer, and engineer.

The former cannot, at the tender age of his professional life, digest the ponderous masses of ocular lore which adorn the shelves of the maturer student's library; and the latter, while he is glad to have these elaborate works at his command for reference, is refreshed by a perusal of a few pages of the more unpretending, but not less valuable vade-mecum.

The former cannot, at the tender age of his professional life, digest the ponderous masses of ocular lore which adorn the shelves of the maturer student's library; and the latter, while he is glad to have these elaborate works at his command for reference, is refreshed by a perusal of a few pages of the more unpretending, but not less valuable vade-mecum.

Asser tecum si vis vivere mecum.