. The Biological bulletin. Biology; Zoology; Marine biology. DIURNAL MIGRATION OF PLANKTON 405 used (see Fig. 1, B). The top clamp is composed of two separate parts, as shown in Fig. 2, A. The split lug (1), which is cast to fit the lay of the cable, is first rigidly fixed in position by tightening the four screws. Since the lug is small enough to pass through the sheaves, this opera- tion may be performed on deck and the cable then lowered away until the lug reaches a position about two meters above the water. The second part (2), of the upper clamp, is next closed around the lug as shown in
. The Biological bulletin. Biology; Zoology; Marine biology. DIURNAL MIGRATION OF PLANKTON 405 used (see Fig. 1, B). The top clamp is composed of two separate parts, as shown in Fig. 2, A. The split lug (1), which is cast to fit the lay of the cable, is first rigidly fixed in position by tightening the four screws. Since the lug is small enough to pass through the sheaves, this opera- tion may be performed on deck and the cable then lowered away until the lug reaches a position about two meters above the water. The second part (2), of the upper clamp, is next closed around the lug as shown in B (Fig. 2). This fitting swivels freely around the lug. The upper edge of the net frame is provided with a flanged plate (3) which is next secured in the slot (4) of the fitting. This is accomplished by depressing against an internal spring the trigger end (5) of the U-shaped bolt (6). The latch end (7) of the bolt is thus withdrawn from the slot (4), and plate (3) is allowed to slip in. When pressure on the trigger. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-; Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report; HighWire Press. Lancaster, Pa. [etc. ] : Lancaster Press, inc. [etc. ]
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectb, booksubjectzoology
