ditch's Physiology. 58 pages. Paper. 20 cts.
XV. Clapp's 36 Observation Lessons in Minerals. 80 pages. Paper.
30 cts.
XVI. Phenix's Lessons in Chemistry. 20 cts.
Pupils' Note-book to accompany No. 15. 10 cts.

=Hoag's Health Studies.= Practical hygiene for grammar grades. Cloth.
Illustrated. 75 cents.

=Rice's Science Teaching in the School.= With a course of instruction
in science for the lower grades. 46 pages. Paper. 25 cents.

=Ricks's Natural History Object Lessons.= Information on plants and
their products, on animals and their uses, and gives specimen lessons.
$1.50.

=Ricks's Object Lessons and How to Give Them.=--Vol. II. Lessons on
elementary science for grammar and intermediate grades. 90 cents.

=Scott's Nature Study and the Child.= A manual for teachers with
outlines of lessons and courses, detailed studies of animal and plant
life, and chapters on methods and the relation of nature study to
expression. $1.50.

=Sever's Elements of Agriculture.= For grammar grades. Illustrated. 50
cents.

=Shaler's First Book in Geology.= A helpful introduction to the study
of modern text-books in geography. Illustrated. Cloth, 60 cents.
Boards, 45 cents.

=Spear's Leaves and Flowers.= An elementary botany for pupils under
twelve. Illustrated. 25 cents.

=Weed's Farm Friends and Farm Foes.= An elementary text-book on weeds
and insects. Cloth. Illustrated. 90 cents.

=Wright's Seaside and Wayside Nature Reader, No. 4.= Elementary
lessons in geology, astronomy, world life, etc. Illustrated. 50 cents.

_See also our list of books in Science._

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

Science.

=Barto's Agriculture.= Studies in soils and crop production. 50 cents.

=Baskerville's General Inorganic Chemistry.= For colleges. $1.50.

=Baskerville and Estabrooke's Chemistry Problems.= 90 cents.

=Benton's Guide to General Chemistry.= A manual for the laboratory. 40
cents.

=Boyer's Laboratory Manual in Biology.= Treats of both animals and
plants. 80 cts.

=Boynton, Morse and Watson's Laboratory Manual in Chemistry.= 50
cents.

=Burrage and Bailey's School Sanitation and Decoration.= Illustrated.
$1.50.

=Cheston, Gibson and Timmerman's Physics.= Theoretical and
descriptive. $1.25.

=Chute's Physical Laboratory Manual.= Revised edition. Illustrated. 80
cents.

=Chute's Practical Physics.= For schools and colleges. $1.15.

=Clark's Methods in Microscopy.= Deta