Memoirs of the Manchester Literary and Philosophical Society |
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Términos y frases comunes
acid Alcide D'Orbigny amongst animal appears April atmosphere Aurora Borealis barometer beds Bismuth calcareous calcareous matter carbonate carboniferous cells Chalk clay cloud Coal measures Coal-field colour containing copper corals D'Orbigny deposit disc DITTO Drift Ehrenberg Electricity equation exhibit existence feet flint fluid Foraminifera formation fossil frustules galvanometer genus geological grain gravel heat Infusoria iron Irwell January 25th Kirkby Lonsdale land Levant lime limestone m f(x Manchester metals microscopic motion observed occur Oolitic organisms P₁ P₂ particles period phenomena Phidias plants Polythalamia portion present pressure probably produced quantity R. I. Murchison red sandstone repulsive force rocks Rotalia sand sandstone sea breeze seams of Coal seen shells Sigillaria siliceous Silurian species specimens spicula spiculum sponge Stigmaria stone strata structure subsidence surface temperature thickness tion tubers upper new red valley vapour vegetable whilst WILLIAM STURGEON wire zinc
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Página 229 - I knew to the contrary, it had lain there for ever ; nor would it perhaps be very easy to show the absurdity of this answer. But suppose I had found a watch upon the ground, and it should be inquired how the watch happened to be in that place : I should hardly think of the answer which I had before given, — that, for anything I knew, the watch might have always been there.
Página 13 - ... to move hither and thither ; now progressing in a straight line, with the rostra in advance ; now wheeling round and pursuing a different course ; now letting their rostra drop, and oscillating upon them, like (to compare small things with great) balloons ere the strings are cut, or like tops, the centripetal force being nearly expended ; now altogether stopping, and anon resuming their curious and eccentric motions. Truly wonderful is the velocity with which these microscopic objects progress,...
Página 181 - Everything in this southern continent has been effected on a grand scale: the land, from the Rio Plata to Tierra del Fuego, a distance of 1200 miles, has been raised in mass (and in Patagonia to a height of between 300 and 400 feet), within the period of the now existing sea-shells. The old and weathered shells left on the surface of the upraised plain still partially retain their colours.
Página 128 - Proceedings of the Geological and Polytechnic Society of the West Riding of Yorkshire.
Página 182 - The uprising movement has been interrupted by at least eight long periods of rest, during which the sea ate deeply back into the land, forming at successive levels the long lines of cliffs or escarpments, which separate the different plains as they rise like steps one behind the other.
Página 447 - ... to 1300. Having made a number of experiments during the summer, I am satisfied that this solution has in a high degree the property of preventing decomposition in organic matter, several cesspools and other places which gave out the most putrid odour, having been almost instantaneously sweetened by its application, an effect heightened by a small quantity of free chlorine which this liquor always contains. I need scarcely describe to chemists the action of this salt, the principal effect being...
Página 7 - The remains of such minute animals have added much more to the mass of materials which compose the exterior crust of the globe, than the bones of Elephants, Hippopotami, and Whales.
Página 13 - Zygnema, &c., they fall into the water, through which they speedily begin to move hither and thither ; now progressing in a straight line, with the rostra in advance ; now wheeling round and pursuing a different course ; now letting their rostra drop, and oscillating upon them, like (to compare small things with great) balloons ere the strings are cut, or like tops, the centripetal force being nearly expended ; now altogether stopping, and anon resuming their curious and eccentric motions. Truly...
Página 132 - ... changes, and there is generally a lull of an hour, or an hour and a half's duration. The sea breeze then sets in, the ripple on the surface of the water indicating its commencement, being first observed close in shore, and extending itself gradually out to sea. The sea breeze is freshest from two to four, and progressively declines in the evening hours.
Página 252 - Field. FIGURE 8 shows the form of the curve obtained by plotting the reciprocal of the susceptibility of soft iron against the intensity of the exciting field. The ratio of the abscissa of...