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Updated: May 28, 2025
But the valves are solely made and instituted lest the blood should pass from the greater into the lesser veins, and either rupture them or cause them to become varicose; lest, instead of advancing from the extreme to the central parts of the body, the blood should rather proceed along the veins from the centre to the extremities; but the delicate valves, while they readily open in the right direction, entirely prevent all such contrary motion, being so situated and arranged, that if anything escapes, or is less perfectly obstructed by the cornua of the one above, the fluid passing, as it were, by the chinks between the cornua, it is immediately received on the convexity of the one beneath, which is placed transversely with reference to the former, and so is effectually hindered from getting any farther.
The general outline of the moulding is a gracefully flowing cyma, or wave, concave at one end, and convex at the other, like an Italic f, the concavity and convexity being exactly in the same curve, according to the line of beauty which Hogarth describes.
The shaft is sunk into the end of a rod of hard wood and secured with gutta and fine rattan lashing. The handle of hard wood is about a foot in length, half an inch in diameter, and slightly bowed in the plane of the blade, the convexity being in the direction of the cutting edge of the blade.
It was a featureless convexity of chalk and soil an ordinary specimen of those smoothly-outlined protuberances of the globe which may remain undisturbed on some great day of confusion, when far grander heights and dizzy granite precipices topple down.
I went carefully over the entire convexity, and six times more the chill ran through my arm. There were seven circles an inch wide in the curved place, each of which communicated the precise sensation I have described. The convexity on the opposite side of the slab gave exactly the same results.
One would suppose, from the picture, that when an observer is at a great height the earth would appear to rise under him, like some great round and well-curved shield whose convexity was towards him. Instead of this, the aeronaut finds the earth presenting the appearance of a great hollow basin, or of the concave side of a well-curved shield.
Hovell in 1823 in penetrating towards Port Phillips, to which the names of the Goulburn, the Hume, and the Ovens, had been given; and as I was 300 miles from the track these gentlemen had pursued, I considered it more than probable that those rivers must already have formed a junction above me, more especially when I reflected that the convexity of the mountains to the S.E. would necessarily direct the waters falling inwards from them to a common centre.
On land, as well as on sea, the remote distance had completely disappeared, and it seemed as though the globe had assumed a more decided convexity. At the pace at which they were walking, it was very evident that the captain and his attendant would not take long to accomplish the three miles that lay between the gourbi and the place of rendezvous.
Hence the impression of concavity; and this impression must remain, until the elevation shall bear so great a proportion to the extent of prospect, that the apparent parallelism of the base and hypothenuse disappears when the earth's real convexity must become apparent. Qui n'a plus qu'un moment a vivre N'a plus rien a dissimuler. Quinault Atys.
There was always such a silence in the room after the elder had sat down and adjusted his spectacles that I could hear the ticking of the watch he carried in the pocket of his broadcloth waistcoat. For my own part I know I looked with too much longing for the good of my soul on the great gold chain that spanned the broad convexity of his stomach.
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