John Petering, ed.
Volume 3, for Grade 8, revised, explores
the further study of optics, heat, electricity, hydraulics,
hydrostatics, aeromechanics, and acoustics.
Several experiments on each topic along with methodology are included.
Waldorf Publications
ISBN 0-9623978-6-5
Softbound
61 pages
8.5 x 11 inches
Illustrated