Has awl tfpart of the candle been consumed or lost! Wty ‘ does the wick turn black as it burns? Because every irregularity of the surface acts as a point of radiation, or an outlet by which the heat escapes. But the total amount of heat, and probably of light, generated through the lengthy period of this slow oxydation, amounts to exactly the same as would be evolved during the most rapid combusti’n of the same substances. The wick of a candle, which retains the slightest spark, being immersed in oxygen, will instantly burst into a brilliant flame; and even a piece or iron wire made red-hot, and dipped in oxygen, will burn rapidly and brilliantly. Unconsumed particles of coal, rendered volatile by heat, and driven off. No; for reflectors at once send back the heat which they receive, while absorbers retain it.
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But caloric, in some degree, exists ix every known substance.
Because a thin coating of soot acts as a good aosorber of heat, and oereomes the non-absorbing ouality of the bright surface. Why is there so little smoke when thefire is red? How can we ascertain that wood prevents the conduction of heat to the hand? The boiling of water is caused by the heated water ascending from the bottom, and the colder water descending to occupy its place. Because it is a law of nature that heat’shall always attend motion; and it is generally found that the intensity of heat bears a specific relation to the velocity of motion.
In like manner, if we fail to understand Nature, its beauties, its teachings are lost. The charcoal or carbon in any other form being heated to redness, enters directly into combination with the oxygen of the surrounding air, and the carbonic acid gas, being invisible, passes away unobserved.
Wu are all children of one Father, whose Works it should bi oux aelight to study.
Full text of “Nature”
Nitrogen is an elementary body in the form of gas. Why do hay -d.
The breath of life, supplied by the purer oxygen of the “sunny south,” is diffused in salubrious gales over the wintry climes of the north. Because some are bad conductors of heat, and do not draw of much of the warmth of our bodies; while others are better c. Because snow, being a bad conductor, keeps in the internal heat of the dwelling, and prevents the cold outer air from taking awa3 its warmth.
It then communicates the results back to the EU digitally, where mimics are presented to the normal exchange testing equipment. How many deqrees of heat are latent, or hidden, in the different states of awater? Could animals live in nitrogen? An elementary body is one of those substances in which chemistry is unable to discover more than cne constituent. Therefore, ice requires to take up 1, deg.
Because as they breathe more rapidly, the combustion of the carbon in the blood is increased by the oxygen inhaled, and greater heat is developed. When the rays of heat strike upon the earth’s surface, they are passed from particle to particle into the interior of the earth’s crust.
Why, under these circumstances, do they feel neither hot nor cold? Why, when we place our hands in water, which may be of the same temperature as the air, does the water feel some degrees colder? Yes; whenever oxygen combines with carbon to form carbonic acid gas, an extrication of heat takes place, however minute the amount.
Until it has brought the part touching it to the same temperature as itself. O Lord, our L rd, how excellent is thy name in all the earth I who hast set tlhy glory above the heavens. What is formed by the union of oxygen and carbon? VWhy, if a hot and a cold body were placed near to each other, would the cold one become warmer, and the hot one cooler?
lynx-lviiu Candles, why do composite and Charcoal fires, why do they not wax not require snuffing The candles, gas, or fires that may be burning in the rooms where people are assembled. The most elaborate imitations of living foliage upon the lynx-lvjii ceilings of Italian palaces bear no comparison with the beauteous profusion of extinct vegetable forms with which the galleries of these instructive coal mines are overhung.
Generally speaking, solids, especially those of them that are dense in their substance. Fur, wool, down, wood, cotton, paper, and all substanace of a spongy or porous texture. WFhy do some articles of clothing feel cold, and others wacrm? What is the best method of preventing the explosion oJ gas?