The discoverers and.conquerors of the past centuries had, says " Engineering," three chief dangers to moct—savago tribes, savage animals, and. murderous climates. Savage tribes are, not now thought of in the first instance. There are not many parts of the world left where the native has not been reduced to estate of more of less complete dependence, not to use harsher terms. Wild animals have almost everywhere become too scarce to constitute a serious danger for the invader. The climate in itself, the temperature extremes and changes, are less dangerous than-was believed. But we have had to learn that- small insects and. other animals, which we regard as troublesome nuisances in the temperate zone, are far more to be feared' than the big rapacious animals. which occa sionally claim a victim. Everything is done to develop a fertile country: vast sums are spent upon irrigating territories Ibject to continued droughts, railways and bridges are built under great difieulties to render the country accessible and transport easy; and then some wretched fly, or gnat, or bug comes and spreads a mysterious disease, kills off the. stock, poisons the people, and ruins the country: The engineer can help to fight such plagues, and it is to interest to do it. Applied sanitation is, after all, engineering science; and without the engineer mosquitoes and ti will never pocuppressed. and the decimation of men and domestic animals cannot be prevented. Slooping sickness, continues Engineering," has more or less been known in West Africa for over " hundred years, During the last thirty yeats it has travel Seoul there is no place of importance.
Tt is already night before. you have 1ed inland, and the illness has now spread covered the 276 miles to the capital. all round. The patient becomes more leth-Nominally you should make your run tic and weak, and walks like a drunken in el or twelve hours; inp it may be anything. The trains are very heavy, almost too heavy in this Jand of stoop gradients, and your Baldwin engine, although willing, cannot po form the impossible. At el at night, may be, have you'luck, yeu re caution ly steaming round a roaring hoarsely at everything, with the bellow of the 100-ton engine to give you way. It is Seoul at last. "After a journey of thirty-four hours on Japanese soil, of nine across the water strip, and of fifteen "For te Boop 1s tae Lire."—If the blood is laden with impurities it spreads disease as it circulates through the organs of the human body—Lungs, Heart, Stomach, Kidneys, Brain. Clarke's World-tsined Blood Mixture is warranted to cleanse the blood from all impurities from whatever cause arising. For Scrotala, Scurvy, Eczema, Bad Legs, Skin and Blood Diseases, Pimples, and Sores of all kinds its effects are marvellous, Thousands of wonderful cures have been. effected by it. Sold everywhere at 2s. 94. Beware of worthless imitations and substitutes—ADy imps tremble, the temperature rises at night and fal the morning, and goes down to 92 dog. in the last stages tunable to food himself, the pat starves, or is exposed by his own people, who know that there is no help, to die from exhaustion and neglect, or to fall a victim to some bacteria which a healthy organism might resist. The illness, continues "Engineering," is really due tothe inoculation of cattle with a minute para-sitio organism, conveyed frou host to host by the fly. The organism is a kind of protozoon, which is transmitted to human beings by the tse-tso fly. The fly sucks up the protozoon with the blood of the animal it bites The protozoon pass into the stomach of the fly, an'l out agai through the proboscis, together with the saliva. In the blood of the infected m: the protozoon multiplies, but not necessarily to any great extent. The victim hardly feels any pain on being bitten, and for one, two, and even three years no wrong may be suspected; for it is. only when the protozoon reaches. the cerebra-spinal, canal that characteristic symptoms are el The blood-vessels of the brain then become obstructed, so thatthe brain is no
Text read from the printed page and cleaned; old type leaves the occasional error.