468 Hi. C. Hovey—Discoveries in Western Caves. 
in thickness and as yellow as jasper. We measured one that 
arose eighty feet from what we regarded as its base to the ceil- 
ing, and found it twenty-six feet in its longest diameter 
Descending into a pit, we found what we named the Catacombs, 
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in height from three to thirty feet. The echo is a musical pro- 
longation of sound, rather than a distinct repetition of words, 
although this also may beobtained. Harmonics were produced 
in reponse to certain key-notes. A strong vocal impulse was 
prolonged with sustained vigor for fifteen seconds, and in the 
opinion of others for a longer time; the duration depending 
much on our location on the water, the purity of tone, the 
pitch and the energy of the original aérial vibrations. By 
silently but forcibly pushing the water to and fro with a broad 
paddle, successive wavelets were sent into numerous marginal 
cavities, awakening chimes that continued for from three to ten 
highest in the Rotunda, where it reached 58°. The lowest 
in Lucy’ , namely, 54°. It was 
57° in three places; but in forty-two observations the mercur, 
stood at 56°. The water in all the rivers was also at 56, 
instead of at 54°, as often stated. In three springs the mercury 
fell to 58°, and in one, Richardson’s Spring, to 52°, which was 
the lowest degree marked anywhere. The temperature of the 
rivers is identical with that of the atmosphere over them; the 
Crawford County, Indiana, half a mile from Blue River and five 
miles from the Ohio. A map of the cave was prepared by Dr. 
Talbot in 1852, revised by me in 1854, and published in Owen's 
Indiana Geological Report, in 1860. A new map is shortly to 
appear noting corrections and recent discoveries. The length 
Sea 
