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Updated: May 23, 2025
On the same day, at Des Moines, Newcomb could perceive, through somewhat hazy air, no long rays, and the four-pointed outline of the corona reached at its farthest only a single semidiameter of the moon from the limb.
Each of the laminae can be seen to be composed of two, three, or four layers of ligneous tubes; but supposing each ring the growth of one year, and the semidiameter of a mowana of one hundred feet in circumference about seventeen feet, if the central point were in the centre of the tree, then its age would lack some centuries of being as old as the Christian era . Though it possesses amazing vitality, it is difficult to believe that this great baby-looking bulb or tree is as old as the Pyramids.
Does not the cone of the shadow cast by the earth extend beyond the moon?" "Yes, if we do not take into consideration the refraction produced by the terrestrial atmosphere. No, if we take that refraction into consideration. Thus let <lower case delta> be the horizontal parallel, and p the apparent semidiameter " "Oh!" said Michel. "Do speak plainly, you man of algebra!"
"Is it because the cone of shade thrown by the earth does not extend beyond the moon?" "Yes, if you do not take into account the refraction produced by the terrestrial atmosphere, not if you do take that refraction into account. Thus, let delta be the horizontal parallax and p the apparent semidiameter " "Ouf!" said Michel, "half of v zero square! Do speak the vulgar tongue, man of algebra!"
Each semicircular niche was about a foot in its semidiameter. In the centre of this subterranean chamber was a solid square column, or pier, rising to the roof, and containing other niches of the same pattern, besides one that was high and deep, rising to the height of a man from the floor on each of the four sides.
As the semidiameter was only 28 inches, this large tree could have been but 168 years old. I found also a piece of palm-tree transformed into oxide of iron, and the pores filled with pure silica. These fossil trees lie upon soft gray sandstone containing banks of shingle, which forms the underlying rock of the country all the way from Zumbo to near Lupata.
Taking the apparent semidiameter of the nubecula major at three degrees, and regarding its solid form as, roughly speaking, spherical, its nearest and most remote parts differ in their distance from us by a little more than a tenth part of our distance from its center.
Each semicircular niche was about a foot in its semidiameter. In the centre of this subterranean chamber was a solid square column, or pier, rising to the roof, and containing other niches of the same pattern, besides one that was high and deep, rising to the height of a man from the floor on each of the four sides.
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