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Book: Gardening Science - Soils, Manure and the Environment

Chapter 3: Heat, Light and Electricity

Agency of heat, light, and water
Solar heating
Theories about the nature of heat
Heat radiated by the sun
Clouds and solar heat
Fog and solar heating
Heat loss by radiation
Frost hollow pockets
Frosts on still nights
Coverings for frost protection
Position of frost protection covers
Heat produced by walls
Heat from a covering of snow
The cause of dew
The nature of light
The influence of solar rays on vegetation
The three properties of light
The influence light on vegetation,
Electrical effects on vegetation
The nature of electricity
The application of electricity to promote the growth of plants
Water is a compound of oxygen and hydrogen
The necessity of water for vegetation

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