1 84 POPULAR LECTURES AND ADDRESSES. 



other parts of the world generally the diurnal tide 

 comes so much into play that we have exceedingly 

 complicated action. The most complete thing 



FIG. 29. Tide Predictor. 



would be a table showing the height of the water 

 every hour of the twenty-four. No one has yet 

 ventured to do that generally for all parts of the 

 world ; but for the comparatively complicated tides 



