ed. If the school does not own a microscope,
the loan of an instrument should be obtained for at least a few weeks from
some person in the neighborhood.

The appearance of the various structures and tissues of the human body as
revealed by the microscope possesses a curious fascination for every
observer, especially for young people. No one ever forgets the first look
at a drop of blood, or the circulation of blood in a frog's foot as shown
by the microscope.

[NOTE. For detailed suggestions in regard to the manipulation and use
of the microscope the student is referred to any of the standard works
on the subject. The catalogues of scientific-instrument makers of our
larger cities generally furnish a list of the requisite materials or
handbooks which describe the use of the various microscopes of
standard make.

The author is indebted to Bergen's _Elements of Botany_ for the
following information concerning the different firms which deal in
microscopes. "Several of the German makers furnish excellent
instruments for use in such a course as that here outlined. The author
is most familar with the Leitz microscopes, which are furnished by Wm.
Krafft, 411 West 59th St., New York city, or by the Franklin
Educational Co., 15 and 17 Harcourt St., Boston. The Leitz Stand, No.
IV., can be furnished duty free (for schools only), with objectives 1,
3, and 5, eye-pieces I. and III., for $24.50. If several instruments
are being provided, it would be well to have part of them equipped
with objectives 3 and 7, and eye-pieces I. and III.

"The American manufacturers, Bausch & Lomb Optical Company, Rochester,
N.Y., and No. 130 Fulton St., New York city, have this year produced a
microscope of the Continental type which is especially designed to
meet the requirements of the secondary schools for an instrument with
rack and pinion coarse adjustment and serviceable fine adjustment, at
a low price. They furnish this new stand, 'AAB,' to schools and
teachers at 'duty-free' rates, the prices being for the stand with two
eye-pieces (any desired power), 2/3-inch and 1/4-inch objectives,
$25.60, or with 2-inch, 2/3-inch, and 1/4-inch objectives, and two
eye-pieces, $29.20. Stand 'A,' the same stand as the 'AAB,' without
joint and with sliding tube coarse adjustment (as in the Leitz Stand
IV.), and with three eye-pieces and 2/3-i