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68 M O fi U L L ' S
Reels SHORE LINE AND SHORE DEVELOPMENT — Forces which shape the coast lines and the shores of lakes. How waves change the shore line 1
STRUCTURE OF THE EARTH, THE — A fascinating and
informative picture 1
VOLCANOES — The part plaved by volcanic activity in changing the surface of the earth. The mechanics of lava extrusion are shown in detail and emphasis is laid upon the varieties of eruption in actual scenes of the world's most prominent volcanoes 1
WORK OF UNDERGROUND WATER — A study of the geologic effect of underground water and the expression of rock on the surface. The method by which water dissolves mineral matter and the consequent formation of caves, sink-soles and natural bridges 1
ASTRONOMY
ALL ABOARD FOR THE MOON — A trip to Luna in a
rocket car. 1
EARTH — A comprehensive lesson on the earth and its
satelites 1
HEAVENLY BODIES — A study of the celestial universe 1
WORLD IN THE SKY — An animated picture study of
the planets 1
PHYSICS
COMPRESSED AIR — The principles underlvinq compression and its practical application to the Bessemer Converter,, air brake, air-driven tools and kindred industrial uses 1
ELECTRICAL MEASURING INSTRUMENTS — Their purposes and use 2
ELECTRICAL SCIENCE — Source and application of electroenergy 1
ELECTROMAGNETISM — An exposition of its principles 2
ELECTROSTATICS — An enlightening subject on electricity 1
MAGNETISM — A study of electricity 1
PRINCIPLES OF CURRENT ELECTRICITY — Alternating
and Direct Current explained 2
PRINCIPLES OF CURRENT GENERATION — 2
STUDIES IN SCIENCE — Invisible forces; magnetism and
electrons; through the kaleidoscope 1
HEALTH AND HYGIENE
ARMIES OF HEALTH AND DISEASE — A film lesson in
health and hygiene 1
BENDING THE TWIG — Early training in child health
habits 1
CLEAN UP — How school children take part in cleaning
up the community 1
DRINKING HEALTH — Sanitation and safety through
proper drinking conditions 2
EXERCISE — Development of muscles and body 1
HEALING OF THE HILLS — Sanatorium life at Stony
Wold 1
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