United States or Syria ? Vote for the TOP Country of the Week !
His feet are in the trap of circumstance; his eyes are on an illusion. Mycteroperca moving in its dark world of green waters is as fine an illustration of the constructive genius of nature, which is not beatific, as any which the mind of man may discover. Its great superiority lies in an almost unbelievable power of simulation, which relates solely to the pigmentation of its skin.
A fatal issue is rare, but disfiguring and disabling cicatrices may be left unless great care is employed. Pigmentary Processes. Friction, pressure, or scratching, if long continued, may produce extensive and permanent pigmentation. This is seen in its highest degree in itching diseases like prurigo and pityriasis.
For example, people whose ancestors, through countless ages, lived in the bright sunlight and tropical luxuriance of the warmer climes, have dark eyes, dark hair, and dark skin because nature found it necessary to supply an abundance of pigmentation in order to protect the delicate tissues of the body from injury by the actinic rays of the sun.
They joined us here; and their stock soon reverted to the original white of these islands. THE ELDERLY GENTLEMAN. But have you considered the possibility of your colony turning red? ZOZIM. That wont matter. We are not particular about our pigmentation. The old books mention red-faced Englishmen: they appear to have been common objects at one time.
Many observers have noticed that negroes become several degrees lighter after syphilization; but no definite relation between syphilis and leukoderma has yet been demonstrated in this race. Postmortem examinations of leukodermic persons show no change in the suprarenal capsule, a supposed organ of pigmentation. Climate has no influence.
In the evening Wilson opened the lecture series with a paper on 'Antarctic Flying Birds. Considering the limits of the subject the discussion was interesting. The most attractive point raised was that of pigmentation. Does the absence of pigment suggest absence of reserve energy? Does it increase the insulating properties of the hair or feathers?
In women, during menstruation, there is a general tendency to pigmentation; this is especially obvious around the eyes, and in some cases black rings of true pigment form in this position. Even the skin of the negro women of Loango sometimes becomes a few shades darker during menstruation. During pregnancy this tendency to pigmentation reaches its climax.
"Humph!" thought Allan. "This may be a more serious factor than I've reckoned on. These people are albinos. White hair and pink eyes not a particle of protecting pigmentation. For thirty or so generations they've been subjected to nothing but torchlight. The actinic rays of the sun are infinitely more penetrating than anything they've ever known.
Neuro-fibromatosis is frequently accompanied by pigmentation of the skin in the form of brown spots or patches scattered over the trunk. The disease is often stationary for long periods. In progressive cases the patient becomes exhausted, and usually dies of some intercurrent affection, particularly phthisis.
Normally the sexual centers, and in a high degree the genital orifice, represent the maximum of pigmentation, and under some circumstances this is clearly visible even in infancy. Thus babies of mixed black and white blood may show no traces of negro ancestry at birth, but there will always be increased pigmentation about the external genitalia.
Word Of The Day