. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. BIGELOW: EXPLOKATIONS IN THE GULF OF MAINE. 75 running southeastward from Mt. Desert (Fig. 32) shows the increase in salinity passing off shore in that region. In Massachusetts Bay two pairs of Stations, 6 and 45, and 5 and 4(i, (figs. 27, 28) were taken six weeks apart, purposely to show seasonal change, if anv. But the Fa. n 51 J^8 0 sections show that at both 46 and 5 the salinity at the surface was , at 30 fathoms , and also that there was apparently noth- ing to separate Station 6 from Station 45, at both
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. BIGELOW: EXPLOKATIONS IN THE GULF OF MAINE. 75 running southeastward from Mt. Desert (Fig. 32) shows the increase in salinity passing off shore in that region. In Massachusetts Bay two pairs of Stations, 6 and 45, and 5 and 4(i, (figs. 27, 28) were taken six weeks apart, purposely to show seasonal change, if anv. But the Fa. n 51 J^8 0 sections show that at both 46 and 5 the salinity at the surface was , at 30 fathoms , and also that there was apparently noth- ing to separate Station 6 from Station 45, at both of which the surface sa- linity was ; though as the depth at the former was twenty-five and at the latter forty fathoms, only two samples being taken at each, it is possible that there may be some slight divergence in the interme- diate zone. In short, these four stations certainly do not suggest that there was any seasonal change in the salinity in Massachusetts Bay during our absence, although there was a very pronounced rise in temperature (p. 58) at all depths below five fathoms. Stations 44, 45, 46, all taken on the same day, afford a profile across the Bay, from south to north (fig. 33). The curves show that the core of fresh surface water was thickest in the northern half of the Bay. And as Station 6 is, as we have just seen, interchangeable with 45, and 5 with 46, it is clear that this is the characteristic condition in mid- summer. In the southern half of the Bay, the curve of , found at twenty fathoms at Station 46, rose to within eight fathoms of the sur- face; and the surface salinity was 32 instead of But below twenty fathoms the salinities were slightly lower at Station 44 than in the centre of the Bay. Thus we find reproduced, but on a much smaller scale, the spreading of the salinity curves so pronounced on German Bank, and in the mouth of the Grand Manan Channel. And as pointed out (p. 56) the same thing was true of the Fig. 32.—
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