Harmonic Analysis of Tidal Observations. 



141 



always been deducted before using it in the reductions in the case of 

 the diurnal component of the K-tides." 



We give below the results above referred to by Mr. Ferrel. We 

 may remark, however, that the heights have been abridged by the 

 omission of a place of decimals, and the epochs by the omission of the 

 decimals of a degree. We have not, however, given quite all the 

 results of the United States Coast Survey. Mr. Ferrel's treatment of 

 Mi is not identical with oars, and it is omitted ; also there is no 

 place vacant for some of the smaller overtides in our schedules. The 

 reader especially interested in these tides is therefore advised to refer 

 also to the original sources. The results for St. Thomas are derived 

 from a letter dated March 10th, 1885, addressed by Mr. Ferrel to the 

 superintendent, and kindly communicated to us. 



From the correspondence it appears that the American results 

 should be comparable with the others, or at least that the difference 

 should be insignificant. As remarked, however, in a footnote on the 

 preceding page, this conclusion is open to doubt. We have thought 

 it best, therefore, to keep these results in a table separate from the 

 others.] 



