C r 54 ] 
the Beginning and Ending of each, the Strength of 
tiie Wind and Weight of the Atmofphere by a Ba- 
rometer. . 
CIO. 
The foregoing Articles relate to the Riling and Fal- 
ling of the Water.; the following to the various Mo- 
tions of the Stream, and their Confequcnces. 
On the Coalt of Orkney , and Fair Ifle of Shetland , 
the Body of the Flood comes from the North- welt; 
on the Eaft and Weft Coafts of Lewis, one of 
the Weftern Ides of Scotland, it comes from the 
South. 
4 League or two off the Coaft, the Strength of the 
Stream is fcarce fenftble, except when it is confined 
by Land, or near Rocks or Shoals. 
When the Tide begins to rife or fall on the Shore, 
about that fame time the Stream near the Shore 
begins to turn or reverfe its Dire&ion, a few Irregu- 
larities excepted. 
The Stream of Tide changes its Dire&ion fooner 
near Land than at a Diftancefrom it; infomuch that, 
in a Place two or three Miles from Land, the Turn- 
ing of the Tide is two Hours, or more, later than 
on the adjacent Shore : At intermediate Diftances 
the Streams turns at intermediate times. Hence a 
VefTel may find a favourable Tide near Land, while 
it would be againft her a Mile or two from it; and 
the contrary. 
During the Continuance of Flood, the Stream va- 
ries its Direction gradually from the Eaft toward the 
South, and the Stream of Ebb from the Weft to- 
wards the North: That is, if the Stream, when it 
becomes firft fenftble, runs Eaft, at the latter End of 
the 
