United States or Saudi Arabia ? Vote for the TOP Country of the Week !
Boussingault remarks: "In many flowers there has been observed a very considerable evolution of heat, at the approach of fecundation. If we suppose the fecundation of the flowers of forest trees to be attended with a tenth only of this calorific power, they could not fail to exert an important influence on the warmth of the atmospheric strata in contact with them.
The effluvia, the radiating emanations by the aid of which two distant bodies form a calorific communication with each other, have been very appropriately designated by the name of radiating caloric. Whatever may be said to the contrary, radiating heat had already been the object of important experiments before Fourier undertook his labours.
Thus they supposed a malignity which caused all diseases, as well inflammatory as other fevers, and which was to be forced out of the body by sweating, with their hot therapeutics; they, therefore, attacked all fevers with this chemical ammunition, and attempted to carry them with fire and storm, prescribing the praecipitatus diaphoreticus and sweating regimen, which must have been fatal to many, and no doubt would have been so to many more, if van Helmont had not allowed his patients to dilute the medicine with a thin diet, which rendered the calorific method less fatal.
The purpose to which the phraseology of Properties and Powers is specially adapted, is the expression of this sort of cases. Thus we distinguish the attractive or gravitative property of the earth, and its magnetic property: the gravitative, luminiferous, and calorific properties of the sun: the colour, shape, weight, and hardness of a crystal.
It is now generally admitted that, heat being motion, anything, which, by the cohesion of particles, preserves the continuity of the molecular chain along which the motion is conveyed, must augment calorific transmission.
The stove glowed with calorific energy; General Jackson, who had been lying at his feet, moved farther away. The lamplight grew faint and reddish, and then expired, trailing a thin, penetrating odor. In the dark the heated cylinder of the stove shone rosy, mysterious.
Cider sold in 1782 for six shillings "Old Tenor" a barrel, so it was worth about the same as the wood both in money value and calorific qualities. A hundred years previously in 1679 cider was worth ten shillings a barrel. In 1650, when first made in America, it was a costly luxury, selling for L4 4s. a barrel.
Hence we see that in examining the calorific effects of clearing forests, it is important to take into account the properties of the soil laid bare." The hygroscopicity of humus or vegetable earth is much greater than that of any mineral soil, and consequently forest ground, where humus abounds, absorbs the moisture of the atmosphere more rapidly and in larger proportion than common earth.
Careful measurements effected by M. Fery have furnished, in particular, important information on the radiation of the white oxides; but the phenomena noticed have not yet found a satisfactory interpretation. Moreover, the radiation of calorific origin is here accompanied by a more or less important luminescence, and the problem becomes very complex.
"If the linear measure, or the diameter of a circle which shall include the luminous rays, is 25, that of the calorific spectrum will be 42.10, and of the chemical spectrum 55.10.
Word Of The Day