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A density of population implies a severer struggle for existence, and a consequent repulsion of elements brought into too close contact. In great cities men are brought together by the desire of gain. They are not in a state of co-operation, but of isolation, as to the making of fortunes; and for all the rest they are careless of neighbours.

If, owing to the small size of the abscess or the density of the bone surrounding it, the pus is not reached by this procedure, the bone should be drilled in different directions. [Illustration: FIG.

Increase of density and escape of heat are correlated phenomena, and hence in the foregoing section, treating of the respective densities of the celestial bodies in connexion with nebular condensation, much has been said and implied respecting the accompanying genesis and dissipation of heat.

During this frightful operation the gas was rushing in torrents from the upper and lower valve, but more particularly from the latter, as the density of the atmosphere through which we were forcing our progress pressed so heavily on the valve at the top of the balloon as to admit of but a comparatively small escape by this aperture.

The mist and smoke over the positions seemed to tremble with the blasts. Near-by shells, especially German, broke brilliantly against a background so thick that it swallowed up the flashes of more distant shells in its garishly illumined density.

I had let what I did not care to welcome pass over my mind in the curious density that children adopt in order to avoid receiving impressions blankly, dumbly, achieving by stupidity what they cannot achieve by argument. I think that I had frequently done this; that he had been brought up against a dead wall; although on other sides of my nature I had been responsive and docile.

Owing to its lesser density, the warm air was drawn towards the Yarrow shaft. Both air and light, therefore, penetrated in some measure into the glade. Here Simon Ford had lived with his family ten years, in a subterranean dwelling, hollowed out in the schistous mass, where formerly stood the powerful engines which worked the mechanical traction of the Dochart pit.

Their activity or motion, already different, can be diversified to infinity, augmented or diminished, accelerated or retarded, according to the combinations, the proportions, the pressure, the density, the volume of the matter, that enters their composition.

The weed, now alive with marine life, lost its density, and when, at length, the breeze came, we could feel we were making headway. But had we not been able to force our passage into the open I verily believe we would all have been devoured alive by black crabs, which swarmed upon us.

Being five miles in diameter, on the assumption that its mean density was the same as that of the earth, the weight of bodies on its surface should have borne the same ratio to their weight upon the earth that the radius of the asteroid bore to the radius of the earth; in other words, as 1 to 1,600.