It is hoped that this Volume may prove to be a convenient Manual for those who are engaged in industrious pursuits, and also for students, and for popular reading. To give a complete view of Technology, was far from the Author's intention, and has been rendered unnecessary by the able and thorough work of Dr. Bigelow. He aspires to no higher office than that of introducing the student to a subject of vast extent, and inciting him to pursue it. So far as it presents a formal and somewhat extended view of the connexion between Science and Art, this Treatise may claim to fill a place not yet occupied in our literature. The Author is but too sensible, however, that it will be found defective; and should it contribute, in any degree, to prepare the way for a more copious and accurate work, he will see it superseded without regret. Residing at a distance from the Publishers, the Author has found it impossible to revise the sheets, as they passed through the press. For this important service, he has been indebted to the kindness of a friend, Dr. E. HALE, of Boston, who has been untiring in his attention to it, and who, besides several amendments, has added to the Work about twenty pages of original matter. To him the reader is indebted for the description of printing and the account of Dixon's transferring process, in the body of the Work, and for the article in the Appendix, describing Galvanic Engraving. The Author would also express his acknowledgements to Mr. J. W. INGRAHAM, the able and indefatigable Supervisor of the works incorporated into 'THE SCHOOL LIBRARY,' for the care and accuracy with which he has superintended the execution of the Work, especially in the selection and arrangement of the engravings, and for the useful information embodied in the glossary. UNION COLLEGE, |