Vietnam or Thailand ? Vote for the TOP Country of the Week !
Updated: June 27, 2025
We have heard it suggested that the abundant actinic rays in the dry, cloudless atmosphere are the cause of this invigoration, and also of the unusual brilliancy of the flowers. The only way in which we know that summer is coming is by the more chilling winds, the increased dust, the tawny color of the hills, and the general dying look of things. Every thing is bare, sunny, and sandy.
The signal has been sounded too grave for the ear of the sailor at the masthead and his comrades on the deck who nevertheless feel its vibrations in the ship as the stones of a cathedral are stirred by the bass of the organ. "As with sounds, so with colors. At each end of the solar spectrum the chemist can detect the presence of what are known as 'actinic' rays.
About twenty years ago, however, Von Schmaedel propounded the theory that pigmentation in the hair, eyes and skin was Nature's way of protecting the tissues from injury by the actinic or ultra-violet rays of the sun, which destroy protoplasm.
They have power to cause chemical changes, hence are known as the chemical or actinic rays. It is these the photographer shuts out of his dark room, where he intrenches himself behind a ruby-colored window. The chemical ray cannot pass that; if it did it would spoil his plate.
"The eyes would develop again?" she queried. "Precisely! And so with everything! Take the Folk themselves, for instance. Now that they've been living here a thousand or fifteen hundred years, away from the sunlight, all the protecting pigmentation that used to shield the human race from the actinic sun rays has gradually faded out. So they've got white hair, colorless skins, and pinkish eyes.
The heated air undulates over the field in waves which are visible at a distance; near at hand they are not seen, but roll in endless ripples through the shadows of the trees, bringing with them the actinic power of the sun. Not actinic alchemic some intangible mysterious power which cannot be supplied in any other form but the sun's rays.
Their strongly pigmented skin, which seems to protect them from the actinic rays of the tropical sun, so noxious to Europeans, and their broad nostrils, which inhale a larger number of tubercle bacilli than the narrow nose-slits of the Northerner, are disadvantages in a temperate climate.
The greatest amount of actinic power is shown at E opposite the violet; hence this color "exerts" the greatest amount of influence in the formation of the photographic image. It has been found that the most intense heat is at the extreme red, b.
Sooner might the man of science detect the first moment of actinic impact, and the simultaneously following change in the hitherto slumbering acorn, than the watcher of humanity make himself aware of the first movement of repentance. The influences now for some time operative upon her, were the more powerful that she neither suspected nor could avoid them.
Now, the negro race is that part of mankind which was developed in the tropics. In all the negro's physical and mental make-up he shows complete adaptation to a tropical environment. The dark color of his skin, for example, was developed by natural selection to exclude the injurious actinic rays of the sun.
Word Of The Day
Others Looking