. The Audubon annual bulletin. Birds; Birds. ILLINOIS AUDUBON SOCIETY have proved to our own satisfaction that this rave, though remarkable in many ways, is limited in extent and without the "bottomless pit" and other impossible features. It is peculiar and offers us a problem to solve, in that the air comes out from the one discoverable opening at all hours and at all seasons, which is not the way a limestone cave should behave. It is popularly supposed, by those who do not distinguish between bats and other kind of birds, to be inhabited by birds. Another peculiarity is the elevati
. The Audubon annual bulletin. Birds; Birds. ILLINOIS AUDUBON SOCIETY have proved to our own satisfaction that this rave, though remarkable in many ways, is limited in extent and without the "bottomless pit" and other impossible features. It is peculiar and offers us a problem to solve, in that the air comes out from the one discoverable opening at all hours and at all seasons, which is not the way a limestone cave should behave. It is popularly supposed, by those who do not distinguish between bats and other kind of birds, to be inhabited by birds. Another peculiarity is the elevation of the cave mouth which commands a view of the greater part of two counties. Standing here on the sub-carboniferous formations above the cave mouth, the view for twenty miles to the northwest is of a rolling plain lying several hundred feet below—a plain covered with glacial drift almost to the foot of the hills and underlaid with two thick coal seams and sev- eral thin ones, the true coal measures, the richest in the State. Frequent slips, revealed in almost all of the nearly two score mines whose smoke darkens the sky as seen from this eminence, testify to the wide extent of the disturbance which heaved this and other mountains of rock from their beds in this region, to look out upon the advancing glacier as it came to the very foot of the mountain, wavered, and then retreated, leaving a thin sheet of drift and small boulders, small as compared with those scattered over the prairies of northern Illinois, but glacial material, nevertheless. Sometime, a "sky line drive" will be constructed along the top of the cliff, the magnificent view from which is now obtained only by tiresome climbing. A few miles south from the cave, the vertical cliff is broken by the picturesque Stillhouse Hollow, down which a great volume of water flows from the summit which here is broad enough for fertile fields. The name is due to moonshining operations in the early days. About a quar
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Keywords: ., bo, bookcentury1900, bookcollectionbiodiversity, booksubjectbirds
