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Updated: June 28, 2025
"I want to send a summons to my good friend Margaritis to deliver the two casks of wine." "But he has not got them," said Vernier. "No matter for that; the affair can be arranged by the payment of an indemnity. I won't have it said that Vouvray outwitted the illustrious Gaudissart."
Tom in the meantime was busy with the vernier of his transit. This is an ingenious device for showing the smaller divisions into which the circles of the compass are divided. Tom quickly jotted down his field note in degrees, minutes and seconds.
The evening before Gaudissart reached Vouvray Madame Margaritis had had more difficulty than usual in deceiving her husband, whose mind happened to be uncommonly lucid. "I really don't know how I shall get through to-morrow," she had said to Madame Vernier. "Would you believe it, the good-man insists on watching his two casks of wine.
It would also be a most pleasant task to follow the evolution of our subject in the new era of investigation ushered in by the invention of that marvelous instrument, the telescope, followed closely by the work of Kepler, Scheiner, Cassini, Huyghens, Newton, Digges, Nonius, Vernier, Hall, Dollond, Herschel, Short, Bird, Ramsden, Troughton, Smeaton, Fraunhofer, and a host of others, each of whom has contributed a noble share in the elimination of sources of error, until to-day we are satisfied only with units of measurement of the most exact and refined nature.
"There is no such good fortune in this case, however," he resumed, placing the paper between the two small arms. "But by measurements made by this vernier micrometer caliper I can find the precise thickness of the paper as compared to the other samples." He turned to a microscope and placed the corner of the paper under it.
I glanced at the instrument, which, together with a tell-tale compass, swung from the skylight transoms, and saw that the mercury had sunk in the tube to the extent of nearly an inch since the last setting of the vernier; and, as it was our custom in the Slave Squadron at that time to set the instrument at 8 o'clock a.m. and 8 o'clock p.m., it meant that the mercury had fallen to that extent during the night!
Suppose the distance is 250 feet and the angle 1 deg. 40', then the offset will be 7,271 feet, or 7 feet 31/4 inches. A minute of arc at the distance of 250 feet is seven-eighths of an inch; and this is the most accurate way, for the vernier will not mark so small a space accurately. This should be computed by the surveyor for each observation.
Have you been arguing with him?" added the pitiless landlord; "that must have been funny!" "Funny!" cried Gaudissart. "Funny! Then your Monsieur Vernier has been making fun of me!" "Did he send you there?" "Yes." "Wife! wife! come here and listen. If Monsieur Vernier didn't take it into his head to send this gentleman to talk to Margaritis!"
"Why do you call it a vernier?" said he. "Its proper term is a nonius, because Nonius was its inventor and Vernier took the idea from him." In this the national spirit showed itself. Nonius, a Portuguese, had invented something on a similar principle and yet essentially different from the modern vernier, invented by a Frenchman of that name.
Monsieur and Madame Vernier played their part so well that Gaudissart had no suspicions, and straightway fell into the trap. He gallantly offered his arm to Madame Vernier, and believed that he made, as they went along, the conquest of both ladies, for those benefit he sparkled with wit and humor and undetected puns. The house of the pretended banker stood at the entrance to the Valley Coquette.
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