The Panorama of Science: Or, a Guide to Knowledge

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J. M'Glashaw, 1849 - 320 páginas
 

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Página 247 - The one has suggested to me, that beyond and above all that is visible to man, there may lie fields of creation which sweep immeasurably along, and carry the impress of the Almighty's hand...
Página 71 - Aries the Ram, Taurus the Bull, Gemini the Twins, Cancer the Crab, Leo the Lion, Virgo the Virgin, Libra the Balance, Scorpio the Scorpion, Sagittarius the Archer, Capricornus the Goat, Aquarius the Waterbearer, and Pisces the Fishes...
Página 178 - ... been exposed, is taken away, it throws out a pencil of flame so long, that with this burning machine in my hand, I have taken above sixty steps in walking about my room. When it is electrified strongly, I can take it into another room, and there fire spirits of wine with it.
Página 180 - He afterwards demonstrated by experiments, that the electricity did not reside in the coating, as had been supposed, but in the pores of the glass itself. After a phial was charged, he removed the coating, and found that, upon applying a new coating, the shock might still be received.
Página 98 - ... called in geometry a parabola. But when the ball is thrown perpendicularly upwards, it will descend perpendicularly ; because the force of projection, and that of gravity, are in the same line of direction. We have noticed the centres of magnitude and of motion, but we have not yet explained what is meant by the centre of gravity. It is that point about which all the parts of a body exactly balance each other, in every position of the body ; if, therefore, that point is supported, the body will...
Página 108 - ... circle in the same space of time that the axle describes a small one; therefore the power is increased in the same proportion as the circumference of the wheel is greater than that of the axle. If the velocity of the wheel...
Página 216 - Nothing more convincingly shows how requisite experience is to correct the errors of sight, than the case of a young man who was blind from his infancy, and who recovered his sight at the age of fourteen, by the operation of couching. At first he had no idea either of the size or distance of objects, but imagined that...
Página 308 - ... now become the abodes of myriads of peaceful, civilized, and friendly men, where the desert and impenetrable forest are changed into cultivated fields, rich gardens, and magnificent cities. It is the strong intellect of man, operating with the faculty of language as a means, which has gradually worked this wonderful change. By language, fathers communicated their gathered experience and reflections to their children, and these to succeeding children, with new accumulation: and when, after many...
Página 110 - Yes ; friction is the resistance which bodies meet with in rubbing against each other ; there is no such thing as perfect smoothness or evenness in nature: polished metals, though they wear that appearance, more than any other bodies, are far from really possessing it; and their inequalities may frequently be perceived through a good magnifying glass. When, therefore, the surfaces of the two bodies come into contact, the prominent parts of the.
Página 87 - The moon is a month in going round the earth ; twice during that time, therefore, at full and at change, she is in the same direction as the sun. Both then act in conjunction on the earth, and produce very great tides, called...

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