The conservation policy saved the animals that were at risk.
Newton had divined the principle of the conservation of energy, so far as it belongs purely to mechanics.
From the earliest times the conservation of water has been one of the serious cares of the Arabs.
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.
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.