" The conservation of health," he writes in 1646, " has always been the principal end of my studies."
Hence it is not surprising that, in those more subtle forms in which energy cannot be readily or completely converted into work, the universality of the principle of energy, its conservation, as regards amount, should for a long while have escaped recognition after it had become familiar in pure dynamics.
It was long believed that work done against such forces was lost, and it was not till the r9th century that the energy thus transformed was traced; the conservation of energy has become the master-key to unlock the connexions in inanimate nature.
Newton had divined the principle of the conservation of energy, so far as it belongs purely to mechanics.
Colding, who in 1843 presented to the Royal Society of Copenhagen a paper entitled "Theses concerning Force," which clearly stated the "principle of the perpetuity of energy," and who also performed a series of experiments for the purpose of determining the heat developed by the compression of various bodies, which entitle him to be mentioned among the founders of the modern theory of energy, we come to Dr James Prescott Joule of Manchester, to whom we are indebted more than to any other for the establishment of the principle of the conservation of energy on the broad basis on which it has since stood.
In 1840 he showed that when an electric current was produced by means of a dynamo-magneto-electric machine the heat generated in the conductor, when no external work was done by the current, was the same as if the energy employed in producing the current had been converted into heat by friction, thus showing that electric currents conform to the principle of the conservation of energy, since energy can neither be created nor destroyed by them.
The writings of Joule, which thus occupy the place of honour in the practical 'establishment of the conservation of energy, have been collected into two volumes published by the Physical Society of London.
Clausius and Lord Kelvin on the basis of "Carnot's principle" (1824), modified in expression so as to be consistent with the conservation of energy (see Energetics).
Though controlling all phenomena of which we have any experience, the principle of the dissipation of energy rests on a very different foundation from that of the conservation of energy; for while we may conceive of no means of circumventing the latter principle, it seems that the actions of intelligent beings are subject to the former only in consequence of the rudeness of the machinery which they have at their disposal for controlling the behaviour of those ultimate portions of matter, in virtue of the motions or positions of which the energy with which they have to deal exists.
Matter and force (or energy) are infinite; the conservation of force follows from the imperishability of matter, the ultimate basis of all science.
The beginnings of modern thermochemistry, though made independently of the doctrine of the conservation of energy, are practically contemporaneous with the recognition of that law, and without it the science could scarcely have reached the degree of development which it rapidly attained.
This important principle is a direct consequence of the law of the conservation of energy, but was discovered independently by Hess from accurate experiment.
From the earliest times the conservation of water has been one of the serious cares of the Arabs.
The conservation policy saved the animals that were at risk.
It is thought that they are now being gradually driven out of the district, owing to the increase of regular cultivation, and to the government conservation of the forests.
Mayer's real merit consists in the fact that, having for himself made out, on inadequate and even questionable grounds, the conservation of energy, and having obtained (though by inaccurate reasoning) a numerical result correct so far as his data permitted, he applied the principle with great power and insight to the explanation of numerous physical phenomena.
The National Conservation Commission in 1908 estimated the area of the known gas fields of the country at 9000 sq.
An investigation was made in 1908 for the National Conservation Commission of the ore reserves of the country.
Of these, 387,000,000 acres were still open to entry, but most of this vast extent consisted, in the opinion of the National Conservation Commission of 1908, of lands either arid or otherwise unsuited for settlement.
Besides, he was deeply impressed by the fact of man's personality and by the problem of his personal immortality, which brought him back through Schelling to Leibnitz, whose Monadologie throughout maintains the plurality of monadic souls and the omnipresence of perception, sketches in a few sections (§§ 23, 78-81) a panpsychic parallelism, though without identity, between bodily motions and psychic perceptions, and, what is most remarkable, already uses the conservation of energy to argue that physical energy pursues its course in bodies without interacting with souls ., and that motions produce motions, perceptions produce perceptions.
In this panpsychistic parallelism he was again like Leibnitz, and he developed his predecessor's view, that the conservation of energy prevents interaction, into the supposition that alongside the physical there is a parallel psychical conservation of energy.
The recently created royalties sought from the papacy the conservation of their titles and the benediction of their crowns, and placed themselves voluntarily in its vassalage.
He made experiments, simultaneously with Wallis and Wren, on the collision of hard spherical bodies, and his statement of the results (1669) included a clear enunciation of the conservation of linear momentum, as demonstrated for these cases of collision, and apparently correct in certain other cases, mass being estimated by weight.
The closing of ventilators (accompanied by syringing and damping of surfaces to produce a humid atmosphere) has for its object the conservation of as much solar heat as practicable.
Since there must be the same conservation of energy in morals as elsewhere, the eternal reason is the divine Logos.
- At the opening of the 20th century, during Mr Roosevelt's presidency, the new " Conservation " policy (i.e.
A White House conference of governors of states was held at Washington in May 1909, which drew up a " declaration of principles " for the conservation of natural resources, recommending the appointment of a commission by each state to co-operate with one another and with the Federal government; and by the end of the year thirty-six states had appointed Conservation committees.