496 SEVENTH REPORT—1837. 
the successive stations referred to in the observations on the 
Clyde. The corresponding tide-wave of Liverpool Docks is 
given in the same plate. The stars in each wave mark its © 
centre of length, and serve to show the increasing dislocation 
of the tide-wave during its ascent along the river. 
Plate V. shows the line described by the summit of the 
tide-wave during its transit along the Frith of Clyde and the 
manner in which it was affected by the wind. ‘The wave of 
the 3rd of May was nearly calm; and that of the 24th of April 
is remarkable as having been described partly during a west- 
erly wind and partly during an easterly wind, and so falling 
partly above and partly below the 3rd of May, while none of 
the others present instances of intersection. 
Plate VI. gives the form of the tide-wave of the river Dee. 
Plate VII. contains the channel of the river Dee, with sec- 
tions. 
Plate VIII. is the channel of the river Clyde, with sec- 
tions. 
