Characteristics of the negroes.
A great and striking difference as to the firmness and density of the skin, between the negro and the white, whether it may or may not be called specific, as far as relates to the animal, is the cause of several peculiarities, as well when they are in health as under the power of disease. In all cutaneous maladies, or such as ultimately relieve themselves by suppuration, the sufferings of the blacks are excessive. Blows of the whip, which in a white subject would become encysted tumors, discharge, dry up, heal, and disappear in a few weeks, often remain in a negro more than a year.
The bright red colour of the muscular fibres, an apparently stronger power of contraction, and the whiteness, solidity, and weight of the bones, constitute other peculiarities. The eyes have generally very distinct vision. There are few instances of myopes, and blindness is very uncommon. The teeth are white and firm; they rarely complain of odontalgia, and retain their teeth to old age. Both the Fûrians and neighbouring negroes are attentive to preserve them clean, which is done by rubbing them with the small fibrous branches of the tree called Shaw.
Natrôn.
Natrôn is much used as a veterinary medicine.
As often as the camels, horses, asses, sheep, &c. drink, a large piece of it is put into the trough of water. The natives conceive that it renders them more eager of their food, and thus tends to fatten them. Some camels refuse it, but in general they acquire a preference for that water which is most strongly impregnated. When they refuse it, the natrôn is pulverized, formed into balls, with the flour of maize, and forced down their throats before they drink.
For the human race natrôn is used to remove the head-achs, intermittent and remittent fevers, &c. which prevail during the rainy season. Two or three ounces of crude natrôn are dissolved in water, and taken fasting. It operates as a drastic purge, and with some as an emetic. With robust and plethoric habits, there seems to be no inconvenience from the use of it, but I experienced from it an unfavourable rather than beneficial effect.
Tamarinds.
The tamarind, Thummara Hindi[51] one of the most useful as well as valuable of the productions of the country, supplies the want of many others. In defect of lemons and other acids, this fruit, mixed with water, constitutes an agreeable and refreshing drink. When dried by beating in a mortar, it is formed into cakes, each of 2 or 300 drams in weight. The decoction of it is a mild cathartic, and also operates as a diaphoretic; and the natives attribute to it superior virtue as an antidote against certain poisons.