SECURE THE FIRST NUMBER.-Three dollars per volume is offered for the
first volume of the "New York Mechanic," complete, and 25 cents per number, for several
of the early numbers, by those who neglected to subscribe for the work in season to secure
the first numbers. Thus it will be with the Scientific American; hundreds of people will
wish for it in vain, when the first numbers are out. In anticipation of this circumstance, we
will print a few hundred more copies than are as yet ordered; but not more than will
probably be taken up in two or three weeks.