Carnegie Institution of Washington Publication, Issue 206

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Carnegie Institution of Washington, 1915 - Science

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Page 5 - Mass., at the Biological Laboratory of the Brooklyn Institute of Arts and Sciences at Cold Spring Harbor, Long Island, at Ogunquit, Maine, and at Randolph, NH I wish to express my obligations to Dr.
Page 5 - The Relation of Plants to Tide-levels: A Study of Factors Affecting the Distribution of Marine Plants.
Page 148 - the vertical range of a littoral plant is exactly proportional to the range of the tide'.
Page 141 - In summary of the various effects of tidal changes on plants, we find that these are of most general importance in affecting, first, the amount of transpiration ; second, the time available for gaseous interchange between the shoots and the air ; and, finally in limiting the light-supply and hence the effective photospnthetic activity of littoral plants.
Page 148 - No attempt has been made in the body of this paper to suggest a particular crash sensor scheme or to recommend specific detectors or devices. However, an Appendix is provided in which is described the current General Motors sensor scheme. As air cushion systems are developed and evaluated, it becomes more apparent that the crash sensor is, perhaps, the most vital...
Page 26 - ... muddy bottom with a prolific growth. The presence here at the head of a sizeable stream may account for the abundance of the Ruppia in this vicinity, although this plant is by no means confined to brackish water. In Cold Spring Harbor, Johnson ('15, p. 26) says that Ruppia is most abundant in areas of "soft bottom, bare of Ulva, and usually protected from currents and waves.
Page 50 - All of these facts taken together seem to indicate that a low degree of saturation of the soil with salt or brackish water is...
Page 25 - The extreme upper limit at which Zostera was found — a few plants only — is 1.5 feet, and the extreme lower limit is — 4.5 feet. The species is almost entirely confined to muddy bottoms.
Page 147 - ... and emergence with the rise and fall of the tide. Moreover, the vertical range of littoral species is strictly, sometimes very narrowly, limited. There are no species here, except two or three algae, that are distributed "between tide-marks...
Page 136 - For this purpose three atmometers were used, whose coefficients of correction had been determined by comparison with a Livingston standard atmometer.

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