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Encyclopedia Britannica - Main :: GEO-GNU |
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GFRORER, AUGUST FRIEDRICH (18031861) , German historian, was born at Calw
Wurttemberg
March
' So written, with a medial mem (re) instead of the final (o). to account for the frequent and periodical production of the necessary heat ; but he has the credit of hitting on what is certainly the proximate causethe sudden evolution
evolution
The principal
geyser-tube is that in the latter the effect is not necessarily produced by two distinct sources of heat like the two fires of the experimental apparatus, but by the continual influx of heat from the bottom of the shaft
differences between the boiling-points of 186 225 the different parts of the column owing to 230 241 the different pressures of the superincum- bent mass . This may be thus illustrated:C 249 AB is the column of water; on the right 255 side the figures represent approximately the boiling-points (Fahr.) calculated according to the ordinary laws
places. Both gradually increase as we descend, but the relation between the two is very different at different heights. At the top the water is still 39 from its boiling-point, and even at the bottom it is 19; but at D the deficiency is only 4. If, then, the-stratum at D be suddenly lifted as high as C, It will be 2 above the boiling-point there, and will consequently expend those 2 in the formation of steam. End of Article: GFRORER, AUGUST FRIEDRICH (18031861) If you wish, you can link directly to this article.
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