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Updated: May 9, 2025
Thus, if we live in the Temple, and keep inside its doors, the thermometer in our hearts will be fixed; and the anemometer the measurer of the wind will point to calm all the year round. 'They that trust in the Lord shall be as Mount Zion, which cannot be moved. II. Again, this same attitude of realising the divine Presence, Will, and Help, will bring around us encircling defences.
"I didn't know you had the motor working so fast, Tom." "I haven't," was the young inventor's answer, as he looked up in surprise. "Why, we are going quite fast! It's the wind, Ned. It's right with us, and it's carrying us along." Tom arose and went to the anemometer, or wind-registering instrument. He gave a low whistle, half of alarm. "Fifty miles an hour she's blowing now," he said.
Outside, a queer little house of lattice-work perched on a headland shelters the thermometers and barometers: on a still higher point directly over the foaming breakers is the anemometer, the little instrument which measures the swiftness of the fiercest cyclone as easily as the lightest spring breeze.
For a time we were led to suspect that the lift of curved surfaces little exceeded that of planes of the same size, but further investigation and experiment led to the opinion that the anemometer used by us over-recorded the true velocity of the wind by nearly 15 per cent.; that the well-known Smeaton coefficient of .005 V^2 for the wind pressure at 90 degrees is probably too great by at least 20 per cent.; that Lilienthal's estimate that the pressure on a curved surface having an angle of incidence of three degrees equals .545 of the pressure at 90 degrees is too large, being nearly 50 per cent. greater than very recent experiments of our own with a special pressure testing machine indicate; that the superposition of the surfaces somewhat reduced the lift per square foot, as compared with a single surface of equal area.
The meteorological investigations took on a more definite shape; the instruments intended for the land base were set up on board ship, including self-recording barographs, thermometers, and a Dines anemometer, with which very satisfactory results were got.
Gray, respectable men, with daughters married, leaped over fences and sprang back, prominent legislators hopped howling up and down door-steps, women waved handkerchiefs from windows and porches, the chattering Jode flew from anemometer to rain-gauge, and old Judge Burrage apostrophized Providence in his front yard, with the postmaster's label still pinned to his back.
It was a curious fact that twenty feet away from the path of the wind scarcely a breeze could be felt, while to advance a little way into it meant that one would at once be almost carried off his feet. Tom tested the speed of it one day with a special anemometer, and found that only a few hundred feet inside the zone the wind blew nearly one hundred miles an hour.
The anemometer of the "Robinson" type, having four little hemispherical cups revolving horizontally, furnishes the first hint of another principle of construction adapted to the generation of electricity.
"It's the bitters that does the trick," he was saying, but saw me and called out: "You ought to have been with us and seen Jode. I showed him the telegram, you know. He read it through, and just handed it back to me, and went on monkeying with his anemometer. Ever seen his instruments? Every fresh jigger they get out he sends for.
He glanced at a small anemometer or wind gage, on the craft, and noted that it registered sixty miles an hour. "That ought to do," he remarked. "Now who's going up with me? Will you take a chance, Mr. Petrofsky?" "I'd rather not at first." "Come on then, Ned and Mr. Damon. Mr. Petrofsky and Rad can cast off the ropes." The wind, if anything, was stronger than ever.
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