Science Mysteries
Earth Sciences
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The newspapers and the popular magazines have done the world in general, and this country in particular, an inestimable service in diffusing the knowledge of the danger from mosquitoes, for which we owe them, indeed, an undying debt of gratitude. But their warnings have gone unheeded; or, at least, very little attention has been given to the menace of this most malignant of insects. The author has made a truly intimate study of malaria- in fact, he has limited his private practice to that disease and typhoid fever; and he here presents to the reader the HOW and WHY of this world-wide malady.
As life nears its end with me, I find myself meditating more and more upon the mystery of its nature and origin, yet without the least hope that I can find out the ways of the Eternal in this or in any other world. In these studies I fancy I am about as far from mastering the mystery as the ant which I saw this morning industriously exploring a small section of the garden walk is from getting a clear idea of the geography of the North American Continent. But the ant was occupied and was apparently happy, and she must have learned something about a small fraction of that part of the earth's surface
Nearly six tenths of the earth's land surface receive an annual rainfall of less than twenty inches, and can be reclaimed for agricultural purposes only by irrigation and dry-farming. A perfected world-system of irrigation will convert about one tenth of this vast area into an incomparably fruitful garden, leaving about one half of the earth's land surface to be reclaimed, if at all, by the methods of dry-farming.
A wave of Mysticism is passing over the civilised nations. It is welcomed by many: by more it is mistrusted. Even the minds to which it would naturally appeal are often restrained from sympathy by fears of vague speculative driftings and of transcendental emotionalism. Nor can it be doubted that such an attitude of aloofness is at once reasonable and inevitable.
The great world disaster, ushered in with the dawn of that August morning in 1914, has already brought revolutionary changes in many departments of our thinking. But not the least of the surprises awaiting an amazed world, whenever attention can again be directed to such subjects, will be the realization that we have now definitely outgrown many notions in science and philosophy which in the old order of things were supposed to have been eternally settled.
THIS volume the author has sought to lay before the reader a description of life and times lying beyond the light of history. This is indeed an extensive subject, and calls for some explanation, both as to the general design of the work and what steps have been taken to secure correct information.
Flowers have distinct objects in life and are everything they are for the most justifiable of reasons, i.e., the perpetuation and the improvement of their species. The means they employ to accomplish these ends are so various and so consummately clever that, in learning to understand them, we are brought to realize how similar they are to the fundamental aims of even the human race. Indeed there are few life principles that plants have not worked out satisfactorily.
The mechanical properties of wood are its fitness and ability to resist applied or external forces. By external force is meant any force outside of a given piece of material which tends to deform it in any manner. It is largely such properties that determine the use of wood for structural and building purposes and innumerable other uses of which furniture, vehicles, implements, and tool handles are a few common examples.
he source of man's unhappiness is his ignorance of Nature. The pertinacity with which he clings to blind opinions imbibed in his infancy, which interweave themselves with his existence, the consequent prejudice that warps his mind, that prevents its expansion, that renders him the slave of fiction, appears to doom him to continual error. He resembles a child destitute of experience, full of ideal notions: a dangerous leaven mixes itself with all his knowledge: it is of necessity obscure, it is vacillating and false:--
My sincere desire in the composition of the book was to give the true view of the history of nature, with as little disturbance as possible to existing beliefs, whether philosophical or religious. I have made little reference to any doctrines of the latter kind which may be thought inconsistent with mine, because to do so would have been to enter upon questions for the settlement of which our knowledge is not yet ripe.
THIS volume is not written to entertain those who read for amusement, but to establish and prove, so far as proof can he established and proved, a half-score or more of mighty truths hitherto not comprehended.
One of the most striking effects of external disturbance on certain types of living substance is a visible change of form. Thus, a piece of muscle when pinched contracts. The external disturbance which produced this change is called the stimulus. The body which is thus capable of responding is said to be irritable or excitable. A stimulus thus produces a state of excitability which may sometimes be expressed by change of form.
A treasured reprint by the great philosopher, Voltaire. Those who can make you believe absurdities can make you commit atrocities. -Voltaire
Is Einstein's Unified Field Theory the answer to all of our energy problems? Explored in this compilation of material is how gravity, electricity and magnetism manifest from a unified field around us. Why artificial gravity is possible; secrets of UFO propulsion; free energy; Nikola Tesla and anti-gravity airships of the 20s and 30s; flying saucers as superconducting whirls of plasma; anti-mass generators; vortex propulsion; suppressed technology; government cover-ups; gravitational pulse drive; spacecraft & more.
An ingenious student of science once entertained his generation with a theory of how one might behold again all the stirring chapters that make up the story of the earth. The living scene of our time is lit by the light of the sun, and for every few rays that enter the human eye, and convey the image of it to the human mind, great floods of the reflected light pour out, swiftly and indefinitely, into space. Imagine, then, a man moving out into space more rapidly than light, his face turned toward the earth.