 On watching, he says that the sand at one of the extremities was observed to be gently agitated ; and on this agitation ceasing, the track was found to have added nearly half an inch to its length. " In the course of two or three minutes the sand was...  Transactions of the Tyneside Naturalists' Field Club - 19 페이지저자: Tyneside Naturalists' Field Club - 1860전체보기 - 도서 정보
 | Robert Etheridge - 1898 - 444 페이지
...knots or systems in which neither the commencement nor the termination can be easily detected .... The tracks also occasionally show enlargements placed at some little distance from each other. t" On watching, he says that the sand at one of the extremities was observed to be gently agitated... | |
 | Geological Survey of Western Australia - 1898 - 664 페이지
...knots or systems in which neither the commencement nor the termination can be easily detected .... The tracks also occasionally show enlargements placed at some little distance from each other.t" On watching, he says that the sand at one of the extremities was observed to be gently agitated... | |
 | Geological Survey of Western Australia - 1903 - 342 페이지
...knots or systems in which neither the commencement nor the termination can l>e asily detected .... The tracks also occasionally show enlargements placed at some little distance from each other. f" On •atebing, he says that the sand at one of the extremities was „bserved to be gently agitated... | |
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