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"Topside, pal!" "Roger!" Bud's lips shaped the word silently behind his face mask. In a twinkling both boys flicked their density controls and zoomed upward. The sub at once seemed to betray a hostile intent. It blew its tanks and planed upward in pursuit. But Tom and Bud easily pulled away. Their density units worked like magic, shooting them straight toward the surface. "Wow!"
Fourth. Even if the rays can be made to permeate the thicker parts of the body, it is doubtful whether tumors, such as cancers, sarcoma, fatty tumors, etc., which are as permeable to the rays as the normal soft parts, can be diagnosticated. Bony tumors, however, can be readily diagnosticated; and possibly fibrous tumors, by reason of their density, may cast shadows. Fifth.
In this case the universe must of necessity be spatially unbounded and of finite magnitude, its magnitude being determined by the value of that mean density. If we consider the gravitational field and the electromagnetic field from the stand-point of the ether hypothesis, we find a remarkable difference between the two.
In due time the 62d April, according to the revised Gallian calendar, dawned; and in punctual fulfillment of the professor's appointment, a note was delivered to Servadac to say that he was ready, and hoped that day to commence operations for calculating the mass and density of his comet, as well as the force of gravity at its surface.
Then it began to increase in density until apparently a man stood before them. His skin, like that of all the inhabitants of the planets of the green suns, was green. He was tall and well-proportioned when judged by Earthly standards, except for his head, which was overly large, and which was particularly massive above the eyes and backward from the ears.
Those who were meat eaters or alcohol drinkers, could not survive. Perfect heart and lungs were necessary to stand the heat and density of atmosphere below sea level. He told of a man who had visited his cabin, and had left early in the day, vigorous and strong. A few hours later he was found near the oasis unable to walk, crawling on his hands and knees, dragging a full canteen of water.
And all the while we kept the great waste of weed upon our starboard side, and apart from the mainland of the weed, as it were, there were scattered about an uncountable number of weed islets and banks, and there were thin patches of it that appeared scarce above the water, and through these later we let the boat sail; for they had not sufficient density to impede our progress more than a little.
We were now running on a course that made an obtuse angle with that of the frigate, and there was the possibility of so far increasing our distance as to get beyond the range of the openings of the mist, ere our expedient were discovered. So long did the density of the atmosphere continue, indeed, that my hopes were beginning to be strong, just as one of our people called out "the frigate!"
But no just calculation can be made from the present prices of turpentine, resin, &c., which are not produced upon any large scale. My dear Sir, Until very recently it was supposed that the physical qualities of bodies, i.e. hardness, colour, density, transparency, &c., and still more their chemical properties, must depend upon the nature of their elements, or upon their composition.
We should realize, as I have shown years ago, that the difference of our age from that age is the ever-present fact of the density of our population. Any one who wants to go back, really wants that forty million Germans should die, while he survives. It is ignorant, it is insincere, to put on a frown of offended virtue and to say: For shame, what are you thronging into the towns for?
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