Mass-energy equivalence

Definition and stakes

active 1883-1912 James Weir,  The Energy System of Matter: A Deduction from Terrestrial Energy Phenomena

“ In such circumstances, the earth being assumed to be divided into two equal masses, the maximum limiting value of the gravitative attraction would clearly be attained. Any increase of the one mass over the other would again lead, however, to a diminution in the attractive force and a corresponding decrease in the energy limit for transformation. The precise manner in which the operations of mechanical energy are limited by the mass will now be clear. The principle is quite general, and applicable to all moving bodies. Mass is ever a direct measure of energy capacity. ”
Source: Gutenberg

active 1883-1912 James Weir,  The Energy System of Matter: A Deduction from Terrestrial Energy Phenomena

“ Transmission of Energy from Aqueous Vapour to Air Masses
The working of the second or transmission stage of the atmospheric machine involves certain energy operations in which gravitation is the incepting factor or agency. Let it be assumed that a mass of aqueous vapour liberated at its surface of evaporation by the transformation of axial energy, expands upwards against the gravitative attraction of the earth (§§ 34, 38) . As the gaseous particles ascend and thus gain energy of position, they do work against gravity. This work is done at the expense of their latent energy.
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Source: Gutenberg

active 1883-1912 James Weir,  The Energy System of Matter: A Deduction from Terrestrial Energy Phenomena

“ They are in no way associated with energy transmission; they [Pg 52] are merely the determining causes of the energy-transforming processes which they induce, and do not in the least affect the conservative energy properties of the planetary masses over which their influence is cast. Of the precise number and nature of such influences thus exerted by the primary mass we can say nothing. The energy transformations which are the direct result of their action are so extensive and so varied in character that we would hesitate to place any limit on the number of the influences at work. ”
Source: Gutenberg

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