C l 5 I ] 
Rife and Fall vary fo much, that it would require a 
longer Courfe of Obferyations than I have had Op- 
portunity of making, to determine what is moll fre- 
quent in this Cafe: 
When a Stream of Tiders interrupted by Land, 
or Rocks, or is confined within a Chanel, or long 
Arm of the Sea growing uniformly narrower, the 
W ater will rife higher there than in neighbouring 
Places, where it is not fo affe&ed. If the Chanel, 
or Arm of the Sea, has feveral Windings, or Reaches, 
as they are called in the Thames y the fuperior Ele- 
vation will not be fo confiderable. 
The following Obfervations of the Riling and 
Tailing of the Water, were made in the Day-time, 
in the Bay of Kirkwall , anno 1748. 
T f » * y - 
! ’ » ■ r 1 1 
Auguft 8. Wind W. a Breeze. 
Laft Quarter 4th Day. 
Moon's Apogee diftant 24 0 . 
Moon’s Declination 27 0 N. 
Moon bearing at fir ft W. by N. 
o 1 
Q 
The Water rofe 
1 ft Hour 1 I 
Feet 
O 
Inch* 
jt^ 
i 
id • . ’v 
O 
2 
^ d • • » 
O 
H 
4 th 
O 
<)th 
O 
fb 
- 6 th and to the End . 
O 
fi 
In all 2 y 
Augufi 
