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Updated: May 28, 2025
The tower operators, thinking that it was another airplane, called the pilot of the DC-3 and told him to be careful since there was another airplane approaching the field. As the DC-3 lined up to take off, both the pilots of the airliner and the tower operators saw the light moving in, but since it was still some distance away the DC- 3 was given permission to take off.
A small drain cock is shown at DC, through which the water in the cylinder water-jacket may be drawn off when required. The pipes leading to the inlet and outlet of this supply are connected to the cooling water tank by means of a couple of broad, flat nuts and lead washers, one inside and the other outside the tank, the latter, when clamped up well, making a perfectly water-tight joint.
Here, sixty million years of stopped time had made no difference to these nuclear batteries, that, because of the universal character of physical laws, almost had to be similar in principle to their own. They had almost known that it would make no difference. There had been no drain of power through the automatic safety switches. "DC current, huh?"
As such it is described under the name of Matricaria discoidea DC. It is remarkable for its rapid and widespread distribution, as of late years it has become naturalized in different parts of America and of Europe, where it is to be seen especially in France and in Norway.
Taking, then, the parallelopiped AFB, of which the obtuse solid angle C is contained between the three equal plane angles, and imagining in it the three principal sections, one of which is perpendicular to the face DC and passes through the edge CF, another perpendicular to the face BF passing through the edge CA, and the third perpendicular to the face AF passing through the edge BC; I knew that the refractions of the incident rays belonging to these three planes were all similar.
They hastened to the shore; but the vision of the centenarian sagamore put them all to shame. They could see nothing. At length their doubts were resolved. A small vessel stood on towards them, and anchored before the fort. She was commanded by one Chevalier, a young man from St. Malo, and was freighted with disastrous tidings. Dc Monts's monopoly was rescinded.
This being so, if one draws ID parallel to CM, which I suppose to be the refraction of the perpendicular ray incident at the point C, the distances DC, Dc, will be equal, as is easy to see by that which has been demonstrated in Article 28.
Now it is easy to show that this wave will touch the arc BP at this point C. For since, by construction, FD + 3/2 DG + GL are equal to FB + 3/2 BA + AL; on deducting the equals LH, LA, there will remain FD + 3/2 DG + GH equal to FB + 3/2 BA. And, again, deducting from one side GH, and from the other side 3/2 of AS, which are equal, there will remain FD with 3/2 DG equal to FB with 3/2 of BS. But 3/2 of DG are equal to 3/2 of ES; then FD is equal to FB with 3/2 of BE. But DC was equal to 3/2 of EB; then deducting these equal lengths from one side and from the other, there will remain CF equal to FB. And thus it appears that the wave, the semi-diameter of which is DC, touches the arc BP at the moment when the light coming from the point L has arrived at B along the line LB. It can be demonstrated similarly that at this same moment the light that has come along any other ray, such as LM, MN, will have propagated the movement which is terminated at the arc BP. Whence it follows, as has been often said, that the propagation of the wave AH, after it has passed through the thickness of the glass, will be the spherical wave BP, all the pieces of which ought to advance along straight lines, which are the rays of light, to the centre F. Which was to be proved.
BRITAIN: or a chorographical description of the most flourishing Kingdomes, England, Scotland and Ireland, and the Ilands adioyning; out of the depth of Antiquitie: beautified with Mappes of the severall Shires of England; Written first in Latine by William Camden, Clarenceux K. of A. Translated newly into English by Philémon Holland. Londini, Impensis Georgii Bishop & Joannis Norton, M.DC.X.
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