We should be ungrateful not to acknowledge our great indebtedness to the editorial corps generally, for the many generous notices which have been given to the SCIENTIFIC AMERICAN since its commencement, and we hope it may continue to merit and receive their approbation. We have endeavored to keep to our original purpose, viz., to devote our time and talents to the development of the great industrial pursuits of the nation, and we shall in the new volume, as heretofore, remain firm to this purpose, eschewing political and religious controversies as subjects wholly foreign to our sphere of labor. We shall endeavor to render the SCIENTIFIC AMERICAN still worthy of the good opinion of our edito-l rial brethren in all parts of the Union.