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The laws of motion of visible and tangible, or molar, matter had been worked out to a great degree of refinement and embodied in the branches of science known as Mechanics, Hydrostatics, and Pneumatics.
When the time comes to return to the quiet of the mud bed at the bottom, the animal, having had enough of the sun, draws itself wholly into its sheath again and, with a piston stroke, expels the air from the back room. The normal density is restored and it sinks slowly to the bottom. We see, therefore, that the caddis worm has not to trouble about hydrostatics when building its scabbard.
The very necessities of its geographical position had forced it to pre- eminence in hydraulics and hydrostatics. It had learned to transform water into dry land with a perfection attained by no nation before or since. The wonders of its submarine horticulture were the despair of all gardeners in the world.
The law governing the relations of diverse civilizations when brought into contact is not like the law of hydrostatics, whereby two bodies of water of different levels, brought into free communication, finally find a common level, determined by the difference in level and their respective masses.
But what most delighted Popanilla was hearing a lecture from the most eminent lawyer and statesman in Vraibleusia on his first and favourite study of hydrostatics. His associations quite overcame him: all Fantaisie rushed upon his memory, and he was obliged to retire to a less frequented part of the room to relieve his too excited feelings.
From these observations were constructed the barometer, the siphon, the air-gun, and the air-pump. All the laws of statics and hydrostatics were discovered by experiments as simple as these. I would not have my pupil study them in a laboratory of experimental physics. I dislike all that array of machines and instruments. The parade of science is fatal to science itself.
That was simple enough, long's I had my truss already invented. The main difficulty was that deep bog. If you studied hydrostatics, you'd soon learn that a sixty-five foot head of water puts an enormous pressure on the bed of a reservoir."
In that country, ever held in existence by main human force against the elements, the arts of engineering, hydrostatics and kindred branches were of necessity much cultivated. It was reserved for the young mathematician to make them as potent against a human foe.
All the laws of statics and hydrostatics are discovered by such rough experiments. For none of these would I take the child into a physical cabinet; I dislike that array of instruments and apparatus. The scientific atmosphere destroys science. Either the child is frightened by these instruments or his attention, which should be fixed on their effects, is distracted by their appearance.
I could have shown her some good puzzles about the squares of the prime numbers up to forty-one. I paused and gave myself more air. "How are you," I asked, "on hydrostatics?" "I beg your pardon," she said. Evidently she was ignorant again. "Have you ever studied the principles of aerial navigation?" I asked. "No," She answered.
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