Library of Useful Knowledge: Natural philosophy, Volumen4

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Página 30 - ... some ants carry corn, and some carry their young, and some go empty, and all to and fro a little heap of dust. It taketh away or...
Página 3 - It must, at the same time, be borne in mind, that the developement of the subject can only be found in the full details of chemical science.
Página 75 - ... should always be liable to derangement, or that it would soon work itself out. Yet shall this wonderful machine go, night and day, for eighty years together., at the rate of a hundred thousand strokes every twenty-four hours, having, at every stroke, a great resistance to overcome; and shall continue this action for this length of time, without disorder and without weariness!
Página 56 - And what thinkest thou (said Socrates to Aristodemus) of this continual love of life, this dread of dissolution, which takes possession of us from the moment that we are conscious of existence ?" " I think of it, (answered he,) as the means employed by the same great and wise artist, deliberately determined to preserve what he has made.
Página 75 - And how well doth it execute its office ! An anatomist, who understood the structure of the heart, might say beforehand that it would play ; but he would expect, I think, from the complexity of its mechanism, and the delicacy of many of its parts, that it should always be liable to derangement, or that it would soon work itself out. Yet shall this wonderful machine go...
Página 23 - Three parts of common salt (muriate of soda) are intimately mingled with one of the peroxide of manganese, and to this mixture two parts of sulphuric acid, diluted with an equal weight of water, are then added. By the action of sulphuric acid on...
Página 50 - The acids are the strongest nitric and sulphuric acids, mixed in the proportion of one part of the former to three of the latter by weight.
Página 51 - Taking it in one hand, and placing the finger of the other on the pulse at the wrist, I satisfied myself that it was indeed the heart which I grasped. I then brought him to the king, that he might behold and touch so extraordinary a thing, and that he might perceive, as I did, that unless when we touched the outer skin, or when he saw our fingers in the cavity, this young nobleman knew not that we touched the heart.
Página 29 - Irishman travelling to the harvest with bare feet : the thickness and roundness of the calf show that the foot and toes are free to permit the exercise of the muscles of the leg. Look, again, to the leg of our English peasant, whose foot and ankle are tightly laced in a shoe with a wooden sole, and you will perceive, from the manner in which he lifts his legs, that the play of the ankle, foot, and toes is lost, as much as if he went on stilts, and, therefore, are his legs small and shapeless.
Página 2 - ... a girl, one of the attendants on the oven, offered to enter, and mark with a pencil the height at which the thermometer stood within the oven. The girl smiled at M.

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