18 



REMARKABLE EFFECTS OF SOL-LUNAR 



are no less manifest at tlie distance of many hun- 

 dred miles from the highest reach of the tides, than 

 at Calcuttay and other parts of Bengal, to which 

 the tides flow daily. The distances marked in the 

 column, appropriated to that purpose, are very 

 nearly the number of miles in a direct hne between 

 tlie places where the observations were made, and 

 the utmost reach of the tides at the springs. Doc- 

 tor Lind's theory made me anxious to ascertain 

 these distances with precision ; and the Military 

 Surveyor General was so obliging as to direct it to 

 be done at his office. 



