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The solutions are put together, and the petroleum ether distilled off in vacuo at a low temperature, until there remains in the flask a dark brown sirup, which on cooling solidifies into a crystalline mass. This is pulverized and turned on to a filter composed of a large funnel, in which a smaller funnel covered with muslin is inserted.
I may here perhaps mention also that water will boil at 100 degrees Fahr. in vacuo, whereas in atmosphere it takes 212 degrees to boil.
Lenard himself, however, with that absence of even involuntary prejudice common to all great minds, undertook to demonstrate that the opinion he at first held could no longer be accepted, and succeeded in repeating the experiment of M. Perrin on cathode rays in the air and even in vacuo.
No knowledge can come out of this straw-splitting in vacuo; and certainly no art out of this indecent pedant's symbolism: all things are turned to dusty, dirty lumber. As with the intellectual, so also, in large degree, with the moral: a splendid will to do right is applied, in its turn, to phantoms. Here again the letters of Abélard and Héloïse are extraordinarily instructive.
I examined the fittings of the apparatus, the strength of which was increased a hundredfold by lenticular rings, placed similar to those in a lighthouse, and which projected their brilliance in a horizontal plane. The electric lamp was combined in such a way as to give its most powerful light. Indeed, it was produced in vacuo, which insured both its steadiness and its intensity.
What light is in the natural world, such is fame in the intellectual; both requiring an atmosphere in order to become perceptible. Hence the fame of Michael Angelo is, to some minds, a nonentity; even as the sun itself would be invisible in vacuo.
Of course, from one point of view very probably that of the writer of the Epistle this conclusion is argued by the consideration that the human mind forms no distinct conception of the formation of solid or any other form of matter in vacuo, where nothing previously existed.
"Young gentlemen, I resume my remarks on the passage of a shot in vacuo, which remarks were interrupted yesterday by general quarters. After quoting that admirable passage in 'Spearman's British Gunner, I then laid it down, you remember, that the path of a shot in vacuo describes a parabolic curve.
Moreover, no salt of pentathionic acid has been prepared in a pure state. The author has succeeded in preparing barium pentathionate thus: A Wackenroder solution was about half neutralized with barium hydrate, filtered, and the clear solution evaporated in vacuo over sulphuric acid. After eighteen days crystals, which proved to be barium pentathionate + 3 molecules of water, formed.
Post uarios casus et tot discrimina rerum uenimus in Latium, but Latium was to be the scene of sanguinary struggles. Another allied and fundamental fallacy, into which all the philosophers and Rousseau had more or less fallen, was reflected and exposed by the Revolution. They had considered man in vacuo.
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