Scientific Papers: Physics, Chemistry, Astronomy, Geology, with Introductions and Notes

Portada
 

Altres edicions - Mostra-ho tot

Frases i termes més freqüents

Passatges populars

Pāgina 250 - ... from the size of a pin's head to that of a pea ; scattered through a large body of sand or clay ; and in this state it is called by the Mandingoes sanoo munko,
Pāgina 4 - Taking him for all in all, I think it will be conceded that Michael Faraday was the greatest experimental philosopher the world has ever seen; and I will add the opinion, that the progress of future research will tend, not to dim or to diminish, but to enhance and glorify the labours of this mighty investigator.
Pāgina 311 - A description of a Machine for finding the Numerical roots of Equations and Tracing a variety of useful Curves.
Pāgina 175 - ... supply his natural warmth in that time. All the warm-blooded animals get their warmth in this way, by the conversion of carbon, not in a free state, but in a state of combination. And what an extraordinary notion this gives us of the alterations going on in our atmosphere. As much as 5,000,000 pounds, or 548 tons, of carbonic acid is formed by respiration in London alone in twenty-four hours.
Pāgina 97 - ... the fluid, that you may see the action better.) You observe that, now I pour in the fluid, it rises and gradually creeps up the salt higher and higher ; and provided the column does not tumble over, it will go to the top. If this blue solution were combustible, and we were to place a wick at the top of the salt, it would burn as it entered into the wick. It is a most curious thing to see this kind of action taking place, and to observe how singular some of the circumstances are about it. When...
Pāgina 197 - This does not depend on the direction of the velocity; for if we swing a weight attached to a thread in a circle, we can even change a downward motion into an upward one. The motion of the pendulum shows us very distinctly how the forms of working power hitherto considered — that of a raised weight and that of a moving mass — may merge into one another. In the points a and b, Fig.
Pāgina 362 - The next long era, termed the Cretaceous, was likewise more remarkable for slow accumulation of rock under the sea than for the formation of new land. During that time the Atlantic sent its waters across the whole of Europe and into Asia. But they were probably nowhere more than a few hundred feet deep over the site of our continent, even at their deepest part.
Pāgina 345 - From the earliest geological times the great area of deposit has been, as it still is, the marginal belt of sea-floor skirting the land. It is there that nature has always strewn "the dust of continents to be.
Pāgina 244 - ... pressure upon it than it could have done without such an alteration of the freezing-point. Pressure furthers in this case, as is usual in the interaction of various natural forces, the occurrence of a change, that is fusion, which is favourable to the development of its own activity. In Sir W. Thomson's experiments, water and ice were confined in a closed vessel, from which nothing could escape. The case is somewhat different when, as with glaciers, the water disseminated in the compressed ice...
Pāgina 150 - Ah! then come our beautiful and fine results shown us by an observant philosophy. Suppose, in place of having nitrogen, or nitrogen HO VOL. xxx— j and oxygen, we had pure oxygen as our atmosphere; what would become of us? You know very well that a piece of iron lit in a jar of oxygen goes on burning to the end. When you see a fire in an iron grate, imagine where the grate would go to if the whole of the atmosphere were oxygen. The grate would burn up more powerfully than the coals ; for the iron...

Informaciķ bibliogrāfica