,
definition and use of words. 25 cents.

=Smith's Studies in Nature, and Language Lessons.= A combination of
object lessons with language work. 50 cents. Part I bound
separately, 25 cents.

=Spalding's Problem of Elementary Composition.= Practical suggestions
for work in grammar grades. 40 cents.

_See also our lists of books in Higher English, English Classics,
Supplementary Reading, and English Literature._

D. C. HEATH & CO., Publishers, Boston, New York, Chicago

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Elementary Science

=Austin's Observation Blanks in Mineralogy.= Detailed studies of 35
minerals. Boards, 88 pages. 30 cents.

=Bailey's Grammar School Physics.= A series of practical lessons with
simple experiments that may be performed in the ordinary
schoolroom. 138 pages. Illustrated. 50 cents.

=Ballard's The World of Matter.= Simple studies in chemistry and
mineralogy; for use as a text-book or as a guide to the teacher in
giving object lessons. 264 pages. Illlustrated. $1.00.

=Brown's Good Health for Girls and Boys.= Physiology and hygiene for
intermediate grades. 176 pages. Illustrated. 45 cents.

=Clark's Practical Methods in Microscopy.= Gives in detail
descriptions of methods that will lead the careful worker to
successful results. 233 pages. Illus. $1.60.

=Clarke's Astronomical Lantern.= Intended to familiarize students with
the constellations by comparing them with facsimiles on the
lantern face. With seventeen slides, giving twenty-two
constellations. $4.50.

=Clarke's How to Find the Stars.= Accompanies the above and helps to
an acquaintance with the constellations. 47 pages. Paper. 15
cents.

=Colton's Elementary Physiology and Hygiene.= For grammar grades. 317
pages. Illustrated. 60 cents.

=Eckstorm's The Bird Book.= The natural history of birds, with
directions for observation and suggestions for study. 301 pages.
Illustrated. 60 cents.

=Guides for Science Teaching.= Teachers' aids for instruction in
Natural History.

I. Hyatt's About Pebbles. 26 pages. Paper. 10 cts.

II. Goodale's A Few Common Plants. 61 pages. Paper. 20 cts.

III. Hyatt's Commercial and other Sponges. Illustrated. 43 pages.
Paper. 20 cts.

IV. Agassiz's First Lesson in Natural History. Ill