ERRATA. 



Page 63. Line 2 from bottom. For "4th and 12th'' read "12th and 15th."' 

 Page 379. In Table 1, opposite to OA. oQm. after the moon's meridian passage, 



or time of lunar mean high water. For "0-140 of a foot'' read 



"0-146 of a foot." 

 Page 381. Line 9. For "period" read "periods.'' 



