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" ... decomposition. And for the same reason, no matter what state of division the disintegrated rock may attain, dust never rises. In portions of the Cave remote from the localities in which the bats hybernate, no organic matter can be recognized by the... "
A Guide Manual to the Mammoth Cave of Kentucky - Page 14
by Charles W. Wright - 1860 - 63 pages
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Buffalo Medical Journal and Monthly Review, Volume 14

Medicine - 1858 - 784 pages
...hybernate, no organic matter can be recognised by the most delicate tests. Not a trace of ozone can bo detected by the most sensitive reagents. From what...observed that the atmosphere of the Mammoth Cave is free from those substances which are calculated to exert a depressing and septic influence on the animal...
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The Boston Medical and Surgical Journal, Volume 60

Medicine - 1859 - 646 pages
...may attain, dust never rises. In portions of the Cave remote from the localities in which the bats hybernate, no organic matter can be recognized by...difference is observed by every one on leaving the Care, after having remained in it for a number of hours. In such instances the impurity of the external...
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