Què en diuen els usuaris - Escriviu una ressenya
No hem trobat cap ressenya als llocs habituals.
Altres edicions - Mostra-ho tot
A Treatise on Solar Action: explaining the causes of light, heat, motion and ...
Visualització completa - 1865
A Treatise on Solar Action, Explaining the Causes of Light, Heat, Motion and ...
Previsualització no disponible - 2015
able accompanied action advance agent appearance approach assume atmosphere attraction battery bodies called cause CHAPTER charged cold collected comet communicated composed condenser condition conduction conductors consideration considered contain currents decomposition described developed direct distance driven earth effects electric fluid electricity elements of matter entirely equally evident examination exerted exhibit exists experiments explain exposed fact fluid force of cohesion gaseous heat hitherto induced influence intense kind known laws light liquid magnetic mass material matter means medium metals mode motion motion of heat mysterious nature necessary observed obtained operation opposite particles passage passes path phenomena phenomenon placed planetary planets poles portions position possession presence principle produced proved quantity radiation reflected repelled repulsion resistance result senses separated showing shown solar ether solar force solar rays solid space substance success sun's supposed surface surrounding theory travelling various voltaic
Pàgina 25 - ... exposed to the full power of solar heat, is but little disturbed. If, however, we reflect the sun's rays from a metal surface, an exactly contrary result takes place : the uncovered parts are the first to melt, and the blackened card stands high above the surrounding portion.
Pàgina 27 - The air on high mountains may be intensely cold, while a burning sun is overhead ; the solar rays which, striking on the human skin, are almost intolerable, are incompetent to heat the air sensibly, and we have only to withdraw into perfect shade to feel the chill of the atmosphere. I never, on any occasion...
Pàgina 12 - The dynamical theory, or, as it is sometimes called, the mechanical theory of heat, discards the idea of materiality as applied to heat. The supporters of this theory do not believe heat to be matter, but an accident or condition of matter ; namely, a motion of its ultimate particles.
Pàgina 38 - The very quality of the solar rays — their incomparable penetrative power — enables us to infer that the temperature of their origin must be enormous ; but in the fall of asteroids we find the means of producing such a temperature. It may be contended that this showering down of matter must be accompanied by the growth of the sun in size ; it is so ; but the quantity necessary to produce the observed calorific emission, even if accumulated for 4,000 years, would defeat the scrutiny of our best...