Knowledge. Most of the memoirs, however, in the American department were written expressly for the work, while severa of the others in this as well as in the other portion have undergone more or less modification. To those who have kindly furnished us with notices of their respective friends, we feel duly grateful. To the public we present the result of our labors, with the desire that it may excite emulation, and illustrate and encourage the talent and persever. wice required for a successfui cultivation of the mechanic arts. 1* H. H. |