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Updated: May 12, 2025
Among these experimenters in aviation, certain forms produced scales which became elongated and finally slit up along the side. These slit scales slowly developed into the feathers of the birds of to-day. Whether the steps by which the change occurred have been correctly stated or not, the result is sure. In the rocks of the chalk period we find the remains of an interesting creature.
This is a delusion, however, for the gaseous exhalation is pronounced by experimenters to be cooler, if anything, than the air; I suppose they mean the air of an ordinary summer day. The walls of the cave arc covered with a deposit of sulphur, and at the extreme end drops of liquid are continually falling.
It was the subject of skeletons that brought this boy back to my recollection. Before a very long time had elapsed, the village smarties began to feel an uncomfortable consciousness of not having made a very shining success out of their attempts on the simpleton from "old Shelby." Experimenters grew scarce and chary. Now the young doctor came to the rescue.
Our process for reducing gases into fluids is of admirable simplicity. A simple bent tube, or a reduction of temperature by artificial means, have superseded the powerful compressing machines of the early experimenters.
There was more promise in the experiments made by Sir George Cayley, and he was followed in the first half of the nineteenth century by half a dozen British experimenters who were convinced that a series of planes, presenting a fixed angle to the breeze and driven against it by a sufficiently powerful motor, would develop a considerable lifting power.
Early among these were several Americans, Oliver Evans, one of the first to project steam railway travel, and James Rumsey and John Fitch, steamboat inventors of early date. There were several experimenters in Europe also, but the first to produce a practical steamboat was Robert Fulton, a native of Pennsylvania, whose successful boat; the Clermont, made its maiden trip up the Hudson in 1807.
"Well, I guess I've got enough in the store now to start you fellows on your way," said Dave Slocum, the proprietor. "Now, what all do you need?" There followed a time of much consultation and anxious questioning before all the enthusiastic young experimenters were satisfied that they were getting the most useful things their limited amount of capital would buy.
Other experimenters have tried to carry materials to make gas. I'm going to take the gas itself in a glass jar." "In a glass jar!" "Precisely. Liquefied hydrogen gas." At that moment Senor Pedro Oje, who had been summoned by Major Honeywell, entered the room. An almost Indian complexion and cast of countenance indicated his Mexican origin.
Carrick Venn was an original, a man of restless curious tastes, and his place, on a Sunday, was often full of visitors: a cheerful crowd of journalists, scribblers, painters, experimenters in divers forms of expression.
It begins thus: "Sir: The first experimenters in animal electricity remarked the property that well calcined carbon has of conducting ordinary galvanic action. I have found that this substance possesses the same properties as metallic bodies for the production of the spark, when it is used for establishing a communication between the extremities of Signor Volta's pile."
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