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Page 108 - The electric conflict acts only on the magnetic particles of matter. All non-magnetic bodies appear penetrable by the electric conflict, while magnetic bodies, or rather their magnetic particles, resist the passage of this conflict. Hence they can be moved by the impetus of the contending powers.
Page 227 - ... elephant, rhinoceros, hippopotamus, horse, ox, two or three species of deer, bear, fox, water-rat, and birds. The bones are for the most part broken, and gnawed to pieces, and the teeth lie loose among the fragments of the bones ; a very few teeth remain still fixed in broken fragments of the jaws.
Page 3 - ... air ; and in this case, the conducting medium or chain of aeriform particles was much shorter. I tried to gain similar results with currents of common electricity sent through flame, and in vacuo. They were always affected by the magnet; but it was not possible to obtain so decided a result as with voltaic electricity, because the magnet itself became electrical by induction, and that whether it was insulated, or Connected with the ground.* IV.
Page 3 - COT lumn of electrical light, varying in length from one to four inches, according to the state of rarefaction of the atmosphere in which it was produced ; and a powerful magnet being presented to this arc or column, having its pole at a very acute angle to it, the arc, or column, was attracted or repelled with a rotatory motion, or made to revolve, by placing the poles in different positions, according to the same law as the electrified cylinders of platinum described in my last paper, being repelled...
Page 157 - Hortus suburbanus londinensis; or, A catalogue of plants cultivated in the neighbourhood of London, arranged according to the Linnean system, with the addition of the natural orders to which they belong, etc.
Page 117 - ... called, is not at the extremity of the needle, but may be represented by a point generally in the axis of the needle at some little distance from the end. It was evident also that this point had a tendency to revolve round the wire, and necessarily, therefore, the wire round the point...
Page 229 - Three fourths of the total number of bones in the German caves belong to two extinct species of bear, and two-thirds of the remainder to the extinct hyaena of Kirkdale. There are also bones of an animal of the cat kind (resembling the jaguar or spotted panther of South America) and of the wolf, fox, and polecat, and rarely of...
Page 369 - Huygens, the greatest geometers of our times, did severally determine the rules of the congress and reflexion of hard bodies, and much about the same time communicated their discoveries to the Royal Society, exactly agreeing among themselves as to those rules. Dr. Wallis, indeed, was something more early in the publication; then followed Sir Christopher Wren, and, lastly, Mr.
Page 40 - It is a well known fact that when two magnets are brought near together, their unlike poles ; *'. e., the north pole of one and the south pole of the other...
Page 228 - ... caves of rocks which it inhabits. This analogy explains the accumulation of the bones in the den at Kirkdale. They were carried in for food by the hyaenas ; the smaller animals, perhaps, entire; the larger ones piecemeal ; for by no other means could the bones of such large animals as the elephant and rhinoceros have arrived at the inmost recesses of so small a hole, unless rolled thither by water ; in which case, the angles would have been worn off by attrition, but they are not.