Eight Years' Wanderings in Ceylon by Sir Samuel White Baker (english novels to read txt) 📕

are also several fine specimens of the large flat buffalo tick; three or four leeches are enjoying themselves on the juices of the naturalist; these he had not felt, although they had bitten him half an hour before; a fine black ant has also escaped during the recent confusion, fortunately without using his sting.

Oil is the only means of loosening the hold of a tick; this suffocates him and he dies; but he leaves an amount of inflammation in the wound which is perfectly surprising in so minute an insect. The bite of the smallest species is far more severe than that of the large buffalo or the deer tick, both of which are varieties.

Although the leeches in Ceylon are excessively annoying, and numerous among the dead leaves of the jungle and the high grass, they are easily guarded against by means of leech-gaiters: these are wide stockings, made of drill or some other light and close material, which are drawn over the foot and trowsers up to the knee, under which they are securely tied. There are three varieties of the leech: the small jungle leech, the common leech and the stone leech. The latter will frequently creep up the nostrils of a dog while he is drinking in a stream, and, unlike the other species, it does not drop off when satiated, but continues to live in the dog's nostril. I have known a leech of this kind to have lived more than two months in the nose of one of my hounds; he was so high up that I could only see his tail occasionally when lie relaxed to his full length, and injections of salt and water had no effect on him. Thus I could not relieve the dog till one day when the leech descended, and I observed the tail working in and out of the nostril; I then extracted him in the usual way with the finger and thumb and the tail of the coat.

I should be trespassing too much upon the province of the naturalist, and attempting more than I could accomplish, were I to enter into the details of the entomology of Ceylon; I have simply mentioned a few of those insects most common to the every-day observer, and I leave the description of the endless varieties of classes to those who make entomology a study.

It may no doubt appear very enticing to the lovers of such things, to hear of the gorgeous colors and prodigious size of butterflies, moths and beetles; the varieties of reptiles, the flying foxes, the gigantic crocodiles; the countless species of waterfowl, et hoc genus omne; but one very serious fact is apt to escape the observation of the general reader, that wherever insect and reptile life is most abundant, so sure is that locality full of malaria and disease.

Ceylon does not descend to second-class diseases: there is no such thing as influenza; whooping-cough, measles, scarlatina, etc., are rarely, if ever, heard of; we ring the changes upon four first-class ailments--four scourges, which alternately ascend to the throne of pestilence and annually reduce the circle of our friends--cholera, dysentery, small-pox and fever. This year (1854) there has been some dispute as to the routine of succession; they have accordingly all raged at one time.

The cause of infection in disease has long been a subject of controversy among medical men, but there can be little doubt that, whatever is the origin of the disease, the same is the element of infection. The question is, therefore, reduced to the prime cause of the disease itself.

A theory that animalcules are the cause of the various contagious and infectious disorders has created much discussion; and although this opinion is not generally entertained by the faculty, the idea is so feasible, and so many rational arguments can be brought forward in its support, that I cannot help touching upon a topic so generally interesting.

In the first place, nearly all infectious diseases predominate in localities which are hot, damp, swampy, abounding in stagnant pools and excluded from a free circulation of air. In a tropical country, a residence in such a situation would be certain death to a human being, but the same locality will be found to swarm with insects and reptiles of all classes.

Thus, what is inimical to human life is propitious to the insect tribe. This is the first step in favor of the argument. Therefore, whatever shall tend to increase the insect life must in an inverse ratio war with human existence.

When we examine a drop of impure water, and discover by the microscope the thousands of living beings which not only are invisible to the naked eye, but some of whom are barely discoverable even by the strongest magnifying power, it certainly leads to the inference, that if one drop of impure fluid contains countless atoms endowed with vitality, the same amount of impure air may be equally tenanted with its myriads of invisible inhabitants.

It is well known that different mixtures, which are at first pure and apparently free from all insect life, will, in the course of their fermentation and subsequent impurity, generate peculiar species of animalcules. Thus all water and vegetable or animal matter, in a state of stagnation and decay, gives birth to insect life; likewise all substances of every denomination which are subjected to putrid fermentation. Unclean sewers, filthy hovels, unswept streets, unwashed clothes, are therefore breeders of animalcules, many of which are perfectly visible without microscopic aid.

Now, if some are discernible by the naked eye, and others are detected in such varying sizes that some can only just be distinguished by the most powerful lens, is it not rational to conclude that the smallest discernible to human intelligence is but the medium of a countless race? that millions of others still exist, which are too minute for any observation?

Observe the particular quarters of a city which suffers most severely during the prevalence of an epidemic, In all dirty, narrow streets, where the inhabitants are naturally of a low and uncleanly class, the cases will be tenfold. Thus, filth is admitted to have at least the power of attracting disease, and we know that it not only attracts, but generates animalcules; therefore filth, insects and disease are ever to be seen closely linked together.

Now, the common preventives against infection are such as are peculiarly inimical to every kind of insect; camphor, chloride of lime, tobacco-smoke, and powerful scents and smokes of any kind. The first impulse on the appearance of an infectious disease is to purify everything as much as possible, and by extra cleanliness and fumigations to endeavor to arrest its progress. The great purifier of Nature is a violent wind, which usually terminates an epidemic immediately; this would naturally carry before it all insect life with which the atmosphere might be impregnated, and the disease disappears at the same moment. It will he well remembered that the plague of locusts inflicted upon Pharaoh was relieved in the same manner: "And the Lord turned a mighty strong west wind, which took away the locusts and cast them into the Red Sea; there remained not one locust in all the coasts of Egypt."

Every person is aware that unwholesome air is quite poisonous to the human system as impure water; and seeing that the noxious qualities of the latter are caused by animalcules, and that the method used for purifying infected air are those most generally destructive to insect life, it is not irrational to conclude that the poisonous qualities of bad water and bad air arise from the same cause.

Man is being constantly preyed upon by insects; and were it not for ordinary cleanliness, he would become a mass of vermin; even this does not protect him from the rapacity of ticks, mosquitoes, fleas and many others. Intestinal worms feed on him within, and, unseen, use their slow efforts for his destruction.

The knowledge of so many classes which actually prey upon the human system naturally leads to the belief that many others endowed with the same propensities exist, of which we have at present no conception. Thus, different infectious disorders might proceed from peculiar species of animalcules, which, at given periods, are wafted into certain countries, carrying pestilence and death in their invisible course.

A curious phenomenon has recently occurred at Mauritus, where that terrible scourge, the cholera, has been raging with desolating effect.

There is a bird in that island called the "martin," but it is more property the "mina." This bird is about the size of the starling, whose habits its possesses in a great degree. It exists in immense numbers, and is a grand destroyer of all insects. On this account it is seldom or never shot at, especially as it is a great comforter to all cattle, whose hides it entirely cleans from ticks and other vermin, remaining for many hours perched upon the back of one animal, while its bill is actively employed in searching out and destroying every insect.

During the prevalence of the cholera at Mauritius these birds disappeared. Such a circumstance had never before occurred, and the real cause of their departure is still a mystery.

May it not have been, that some species of insect upon which they fed had likewise migrated, and that certain noxious animalcules, which had been kept down by this class, had thus multiplied within the atmosphere until their numbers caused disease? All suppositions on such a subject must, however, remain in obscurity, as no proof can be adduced of their correctness. The time may arrive when science may successfully grapple with all human ailments, but hitherto that king of pestilence, the "cholera," has reduced the highest medical skill to miserable uncertainty.

Upon reconsidering the dangers of fevers, dysentery, etc., in the swampy and confined districts described, the naturalist may become somewhat less ardent in following his favorite pursuit. Of one fact I can assure him that no matter how great the natural strength of his constitution, the repeated exposure to the intense heat of the sun, the unhealthy districts that he will visit, the nights redolent of malaria, and the horrible water that he must occasionally drink, will gradually undermine the power of the strongest man. Both sportsman and naturalist in this must share alike.

No one who has not actually suffered from the effect can appreciate the misery of bad water in a tropical country, or the blessings of a cool, pure draught. I have been in districts of Ceylon where for sixteen or twenty miles not a drop of water is to be obtained fit for an animal to drink; not a tree to throw a few yards of shade upon the parching ground; nothing but stunted, thorny jungles and sandy, barren plains as far as the eye can reach; the yellow leaves crisp upon the withered branches, the wild fruits hardened for want of sap, all moisture robbed from vegetation by the pitiless drought of several months.

A day's work in such a country is hard indeed carrying a heavy rifle for some five-and-twenty miles, sometimes in deep sand, sometimes on good ground, but always exposed to the intensity of that blaze, added to the reflection from the sandy soil, and the total want of fresh air and water. All Nature seems stagnated; a distant pool is seen, and a general rush takes place toward the cheering sight. The water is thicker than pea soup, a green scum floats through the thickened mass, and the temperature is upward of 130 Fahrenheit. All kinds of insects are swarming in the putrid fluid, and a saltish