Under the action of solar energy these envelopes are in constant motion.
The plant is the producer of food and accumulator of solar energy or force.
The agency of transfer for solar energy is the vegetable kingdom.
Thermo-electricity renders possible the direct and purposive utilisation of solar energy.
Plato said that Solar Energy found one of its forms of expression in man.
Someday scientists will discover how man can live directly on solar energy.
The winds blow and the rivers run; the crops grow, are gathered and consumed, by virtue of the solar energy.
The theory of solar energy now generally regarded as the true one was enounced by Helmholtz in a popular lecture in 1854.
The only one adequate to this work is solar energy, and this is abundantly at hand.
The light and heat, the two great forms of solar energy, were withdrawn, but something took their place.
