United States or Namibia ? Vote for the TOP Country of the Week !
The supposition that changes in the properties of substances are connected with changes in the numbers, movements, and arrangements of different kinds of minute particles, was used in a general way by many naturalists of the 17th and 18th centuries; but Dalton was the first to show that the data obtained by the analyses of compounds make it possible to determine the relative weights of the atoms of the elements.
I'm sure everything will come out right." The earlier snowfall had diminished when Rouletta stepped out into the night, but a gusty, boisterous wind had risen and this filled the air with blinding clouds of fine, hard particles, whirled up from the streets, and the girl was forced to wade through newly formed drifts that rose over the sidewalks, in places nearly to her knees.
The larger is always open, taking in the water, which is at once the animal's food and air, and which, flowing over the delicate inner surface of the mantle, at once oxygenates its blood, and fills its stomach with minute particles of decayed organized matter. The smaller is shut.
Experiment 34. Experiments with Starch. Experiment 35. Wash a potato and peel it. Grate it on a nutmeg grater into a tall cylindrical glass full of water. Allow the suspended particles to subside, and after a time note the deposit. The lowest layer consists of a white powder, or starch, and above it lie coarser fragments of cellulose and other matters. Experiment 36.
He got excited, threw aside the gravel with his shovel, to come at the real treasure he expected to find. Down he went, till he reached the slope of the reef, where the gravel lay up against it. There, in the corner of the ground, right in the angle of the juncture, as it were, lay the rich glistening gold, all in pure particles, mixed with earth and pebbles.
But we cannot explain sensation without explaining the nature of flesh and of the mortal soul; and as we cannot treat of both together, in order that we may proceed at once to the sensations we must assume the existence of body and soul. What makes fire burn? The fineness of the sides, the sharpness of the angles, the smallness of the particles, the quickness of the motion.
The reason is this: when the sunbeam darts into the leaf and sets all its particles quivering, it divides the protoplasm into two kinds, collected into different cells. One of these remains white, but the other kind, near the surface, is altered by the sunlight and by the help of the iron brought in by the water.
As the final result of all this accumulation of flying and gyrating particles in the earth's neighborhood, we are told that the latter must be transformed into the semblance of a gigantic solid-headed comet provided with streaming tails, the longest of them stretching away from the direction of the sun, while another shorter one extends toward the sun.
The differences of their moisture and juice arise from the difference of particles and various other causes, and they are discriminated by the various particles that feed them. And this is apparent in vines for the excellence of wine flows not from the difference in the vines, but from the soil from whence they receive their nutriment.
Bertie gave it to her, and as Grandma could not bear it in the house, she was obliged to take it out of doors. "The air is better now, isn't it, Grandma?" said Bertie, feelingly. It was not much better, though Grandma did not say so. The small particles were floating about, and she was inhaling them with every breath.
Word Of The Day