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They were removed in time, and he escaped because the concentration was not a mortal one for man. This was, in a sense, an experimentum crucis and, although it did not disprove the extreme danger of prussic acid, if employed in high concentrations, it showed, on the other hand, that it was difficult to gauge the military value by field experiments; battle results were necessary.
Are we then in presence of two mechanical explanations, different indeed, but nevertheless both adaptable to all the facts, and between which it will always be impossible to make a choice? Or, on the contrary, shall we succeed in realising an experimentum crucis, an experiment at the point where the two theories cross, which will definitely settle the question?
"The gradual removal of these suspicions at length led me to the experimentum crucis, which was this: I took two boards, and, placing one of them close behind the prism at the window, so that the light must pass through a small hole, made in it for the purpose, and fall on the other board, which I placed at about twelve feet distance, having first made a small hole in it also, for some of the incident light to pass through.
They are admitted to surpass our American Indians, as well as the Kaffirs and the Joloffs, probably the finest African races; and a careful comparison between New-Zealanders and Anglo-Saxons will, therefore, approach as near to an experimentum crucis as any single set of observations can. The following tables have been carefully prepared from those of Dr.
Further, we know not from one day to another whether we may not be absolutely necessitated to excommunicate that fautor of Gallicanism, Louis the Fourteenth, and before launching our bolt at a king, we may think well to test its efficacy upon a rat. Fiat experimentum. And now to return to our rats, from which we have ratted. Is there indeed no hope?"
It really seemed as if the ague had carried off the last remnants of the illness under which she had been so long labouring. But then, you can never put anything to the experimentum crucis; and there were other causes at work for Adela's cure, which were perhaps more powerful than even the ague.
He is very hard upon the Greeks of Asia, the class from which the witnesses against Flaccus were taken. We know here in England that a spaniel, a wife, and a walnut-tree may be beaten with advantage. Cicero says that in Asia there is a proverb that a Phrygian may be improved in the same way. "Fiat experimentum in corpore vili."
To remove that obstacle in the way of the aqueous theory, or to carry that theory over the obstacle which he cannot remove, our author undertakes to refute my theory with regard to the igneous origin of stony substances, by giving an example of granite formed upon the surface of the earth by means of water, or in what is called the moist way; and he closes his Dissertation with this example as an experimentum crucis.
They are tough, the germs of these little bodies, said the Master. -Three hours' boiling has n't killed 'em. Now, then, let us see what has been the effect of six hours' boiling. He took up another flask just like the first, containing fluid and hermetically sealed in the same way. Boiled just three hours longer than the other, he said, six hours in all. This is the experimentum crucis.
With an excitement pardonable under the circumstances, yet tempered with thankful humility, I now applied my last and severest trial, my experimentum crucis. I turned the stone, now doubly precious in my eyes, with scrupulous exactness upside down. The physical exertion so far displaced my spectacles as to derange for a moment the focus of vision.
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