Popular physiology

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ما يقوله الناس - كتابة مراجعة

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الصفحة 216 - ... or ever the silver cord be loosed, or the golden bowl be broken, or the pitcher be broken at the fountain, or the wheel broken at the cistern. Then shall the dust return to the earth as it was: and the spirit shall return unto God who gave it.
الصفحة 137 - Light as a flake of foam upon the wind, Keel upward from the deep emerged a shell, Shaped like the moon ere half her horn is filled ; Fraught with young life, it righted as it rose, And moved at will along the yielding water. The native pilot of this little bark Put out a tier of oars on either side, Spread to the wafting breeze a twofold sail, And mounted up and glided down the billow In happy freedom, pleased to feel the...
الصفحة 296 - The change continues ; by a singular motion certain parts (corpora quadrigemina), which had hitherto appeared on the upper surface, now pass towards the lower ; the former is their permanent situation in fishes and reptiles, the latter in birds and mammalia. This is another advance in the scale, but more remains yet to be done. The complication of the organ increases ; cavities, termed ventricles, are formed, which do not exist in fishes, reptiles, or birds; curiously organized parts, such as the...
الصفحة 296 - ... a simple fold of nervous matter, with difficulty distinguishable into three parts, while a little tail-like prolongation towards the hinder parts, and which had been the first to appear, is the only representation of a spinal marrow. Now, in this state it perfectly resembles the brain of an adult fish, thus assuming in transitu the form that in the fish is permanent. In a short time, however, the structure is become more complex, the parts more distinct, the spinal marrow better marked; it is...
الصفحة 59 - ... bill : but as this artist has no paws to hold the nut firm while he pierces it, like an adroit workman, he fixes it, as it were in a vice, in some cleft of a tree, or in some crevice : when, standing over it, he perforates the stubborn shell.
الصفحة 109 - Few recitals are more affecting than those of their sufferings during unfavourable seasons, and in bad situations for hunting and fishing. Many assurances have been given me that men and women are yet living who have been reduced to feed upon the bodies of their own family, to prevent actual starvation ; and a shocking case was cited to us of a woman who had been principal agent in the destruction of several persons, and amongst the number her husband and nearest relatives, in order to support life.
الصفحة 345 - After delaying long on account of the unpleasant nature of the operation, I opened the spinal canal of a rabbit, and cut the posterior roots of the nerves of the lower extremity; the creature crawled, but I was deterred from repeating the experiment by the protracted cruelty of the dissection.
الصفحة 18 - ... are .now familiarly spoken of by vegetable physiologists as respiratory organs. What life is, we know not ; what life does, we know well. Life counteracts the laws of gravity. If the fluids of our bodies followed the natural tendency of fluids, they would descend to our feet, when we stood, or to our backs, when we lay. The cause, why they do not, may be referred immediately to the action of the heart and vessels ; but it is evident, that they derive that power from life. Life resists the effects...
الصفحة 306 - ... of the twentieth part of an affirmation, or the quarter of a hope, — of the top of a remembrance, and the North and East corners of a comparison, than of the twentieth part of a pound, or of the different points of the compass, in reference to any part of the globe of which we may be speaking.
الصفحة 170 - Let me have men about me that are fat ; Sleek-headed men, and such as sleep o' nights. Yond' Cassius has a lean and hungry look ; He thinks too much : such men are dangerous.

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