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Updated: May 14, 2025
He sat silent for a moment, then said slowly, almost in a sing-song voice as though reading from a printed page, "I knew he was building some ships on Algon, but I did not know they were warships. He told me they were a new type with an entirely new propulsive principle that one of our scientists had worked out." "There's always that possibility, of course," Newton said.
Thus the mind not only has within itself the propulsive force required to increase its knowledge, but also an established order, which will be steadily maintained throughout its successive and illimitable enrichment by new material; and as it grows and gains strength, it retains its "equilibrium."
But, as we know, from the total propulsive efficiencies, that the screws have high and not widely different efficiencies on these ships, we may argue the other way, and say that there is good reason to consider that at least the upper part of the curve agrees with experience obtained from actual ships.
And the thought of all the sheer brain-power which has gone to the invention and perfecting of those propulsive and explosive machines causes you to wonder whether you yourself possess a brain at all. You can find everything in the British lines except the British Army.
No great amount of damage was done to the furnishings or ordinary ship's fittings. Destructiveness was similar in character throughout all the vessels and involved only important parts of the propulsive mechanism or other operating machinery. We have spoken of the investigation of the vessels by Shipping Board engineers.
Thus he contends that the bird accomplishes its floating feat simply by occasional powerful propulsive efforts, combined with perfect balance. From which he deduces the corollary that "if ever the art of flying, or rather of making flying machines, is attained by man, it will be by combining rapid motion with the power of perfect balancing."
"There were none left in their ship now, and we had been careful in locating the first hole, that it should not damage the propulsive machinery. The second hole was accidental, due to the shift of the machine. The machine itself was wrecked now, crushed by its own reaction.
As regards propulsive efficiency, it would appear that the nearer the screws are to the middle line, the less is the resistance due to the shaft tubes and brackets, and the greater is the gain from the wake in the screw efficiency, but, on the other hand, the greater is the augment of the ship's resistance, due to the action of the screws.
The activities of Edison have been of such great range, and his conquests in the domains of practical arts so extensive and varied, that it is somewhat difficult to estimate with any satisfactory degree of accuracy the money value of his inventions to the world of to-day, even after making due allowance for the work of other great inventors and the propulsive effect of large amounts of capital thrown into the enterprises which took root, wholly or in part, through the productions of his genius and energies.
Hitherto intelligence and volition were accounted real powers; the muscles act, and their action cannot be represented by any scientific expression; a stone flies out of the hand and the propulsive force of the muscle resides in the will; but there has been a revolution, or at least a new theory in philosophy, and our Professor, I say, after speaking with the highest admiration of the human intellect, limits its independent action to the region of speculation, and denies that it can be a motive principle, or can exercise a special interference, in the material world.
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