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Mersenne had tried the experiments for himself, at first without success, but soon with better fortune, after he had been to Rome and had learned more fully about them. “The news of these having reached Rouen in 1646, where I then was,” says Pascal, “I made the Italian experiment, founding on Mersenne’s account, with great success.
During repeated sojourns in Paris, where he made the acquaintance of Gassendi, Mersenne, and Descartes, he devoted himself to the study of mathematics, and was greatly influenced by the doctrines of Galileo; while the disorders of the English revolution led him to embrace an absolutist theory of the state.
He published his experiments and researches in 1645, but dying soon afterwards, his conclusions remained unverified. The fame of Torricelli’s experiments had reached Paris as early as 1644, before their formal publication. Some one, Pascal says, had communicated them to Father Mersenne—both a religious and scientific intimate, as we have already seen, of the Pascal family.
In Paris the elder Pascal became a centre of men of congenial intellectual tastes with himself, and his house a sort of rendezvous for the mathematicians and the physicists of the time. Among them were Descartes, Gassendi, Mersenne, Roberval, Carcavi, and Le Pailleur; and from the frequent reunion of these men is said to have sprung the Academy of Sciences founded in 1666.
The Germans further displayed that ingenuity in fancy stops Mersenne had attributed to them in harpsichords more than a hundred and fifty years before, by a bassoon pedal, a card which by a rotatory half-cylinder just impinging upon the strings produced a reedy twang; also by pedals for triangle, cymbals, bells, and tambourine, the last drumming on the sound-board itself.
"I had intended to send you my World for your New Year's gift," he wrote to the learned Minime, Father Mersenne, who was his best friend; "but I must tell you that, having had inquiries made, lately, at Leyden and at Amsterdam, whether Galileo's system of the world was to be obtained there, word was sent me that all the copies of it had been burned at Rome, and the author condemned to some fine, which astounded me so mightily that I almost resolved to burn all my papers, or at least not let them be seen by anybody.
Fluctibus wrote a long reply, in which he called Mersenne an ignorant calumniator, and reiterated that alchymy was a profitable science, and the Rosicrucians worthy to be the regenerators of the world. This book was published at Frankfort, and was entitled "Summum Bonum, quod est Magiae, Cabalae, Alchimiae, Fratrum Roseae-Crucis verorum, et adversus Mersenium Calumniatorem."
His work here was interrupted only by a few journeys, but much disturbed in its later years by annoying controversies with the theologian Gisbert Voëtius of Utrecht, with Regius, a pupil who had deserted him, and with professors from Leyden. His correspondence with his French friends was conducted through Père Mersenne.
Mr. L., on behalf of the committee who had reported on that subject, returned thanks. He made an interesting extract from the report, by which it appeared how very much stress had been laid formerly on the mode of tooling, by the fathers, both Greek and Latin. In confirmation of this pleasing fact, he made a very striking statement in reference to the earliest work of antediluvian art. Father Mersenne, that learned Roman Catholic, in page one thousand four hundred and thirty-one of his operose Commentary on Genesis, mentions, on the authority of several rabbis, that the quarrel of Cain with Abel was about a young woman; that, by various accounts, Cain had tooled with his teeth, [Abelem fuisse morsibus dilaceratum
In Prance, two priests, Fathers Mersenne and Fournier, published in 1634 a small book called Questions Théologiques, Physiques, Morales et Mathématiques, which contained a detailed description of a submarine boat. They suggested that the hull of submarines ought to be of metal and not of wood, and that their shape ought to be as nearly fishlike as possible.
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