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Updated: May 11, 2025
And they can all go to hell!" For several days nothing seemed to be happening, though Larry had a sense that unknown forces were gathering on distant isothermal lines and bad weather was bearing down upon him.
As the necessity for compressed air power grew, inventors turned their attention to the construction of air-compressing engines that would combine efficiency with light weight and economy of space and cost. The trade demanded compressors at inaccessible localities, and in many cases it was preferred to sacrifice isothermal results to simplicity of construction and low cost.
There are important reasons for the slight variation of the isothermal lines upon the western borders of North America and Europe, and their great change of position in the interior from winter to summer, but these reasons are not at all difficult to understand. The temperature of large bodies of water changes but little throughout the year, for water warms and cools slowly.
Thus," added he, with extreme volubility, "I would have told him my opinion on the isothermal and orthogonal superficies, causing him to observe that the equations of partial differences, of which the geometrical explanation is summed up in two orthogonal superficies, cannot generally be integral on account of their complication.
Assuming that we have an air compressor which shows an isothermal pressure line, there would be some loss of power due to clearance space, because we would have a certain volume of air upon which work was done and heat produced, that heat having been absorbed and the air being retained in the cylinder and not serving any useful purpose.
The temperature of air on entering the cylinder was 50 degrees Fah., on leaving 62 degrees Fah., or an increase of 12 degrees Fah. Without the water jacket and water injection for cooling the temperature it would have been 302 degrees Fah. The water injected into the cylinders per revolution was 0.81 gallon." We have in the foregoing a remarkable isothermal result.
'Yes; Lower Canada is much colder than our section of the Province. Learned men say something about the regular northward tendency of the isothermal lines from east to west; certain it is that, the farther west you go, the higher is the mean annual temperature, back to the Pacific, I believe. So the French Canadians have much the worst of the cold.
Were it possible to retain the heat which is in the air, and which is represented by the space between the dotted isothermal curve and the actual curve, we might attain high efficiency in using compressed air power, but it is evident that the power represented by the area of this space will be lost by radiation of heat before it is used in an engine situated several hundred feet away.
Such, in every zone, and in all the families of American plants, is the prodigious force of vegetation, that, in the latitude of fifty-seven degrees north, on the same isothermal line with St. They contain thirty persons. These boats remind us of the canoes of the Rio Chagres in the isthmus of Panama, in the torrid zone.
This is just following the isothermal line, and proves that the peccary cannot endure the rigours of a severe winter climate. It is a production of the tropics and the countries adjacent. Some naturalists assert that it is a forest-dwelling animal, and is never seen in open countries.
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