TIDAL OBSERVATIONS. 131 



R T ML N MS 



h m li m h m h m h m h m 



4 5^7 I 44"9 II i3"3 5 ^'5 10 42'3 



7 29"4 



5 15-4 3 48-6 4 33-8 



\ V n 



li m h m h m 



5 27'5 9 S5'2 I i4'4 



A comparison between the calculated and recorded heights for Liverpool 

 is appended (§ 68). 



65. The Eanisgate observations for 1864 have again been taken np, and 

 the value of the tide-components for the series not included in the lleport 

 for 1868 have been calculated. The whole is here given, and the epochs 

 have been corrected and are reckoned from the true hour-angles of each. 



Yr. 1864. A=io-i9S8ft. Averageinclinationof moon'sorbit to earth'sequator=io°-3o. 



S K L ^ US 



Eetardation of i)base of Spring-tides 2'' 4'' 24" ] n. i 



Coincidence of phase of Declinational tides 6^ 16" 40- j "^^'i' '"°°'^ « syzygies. 



66. Through the kindness of Prof. Peirce of the U. S. Coast Survey a series 

 of tide observations, taken at Fort Point, San Francisco Bay, California, from 

 1858, October 1, to 1859, September 30, has been received and thoroughly 

 analyzed. The epochs are referred to tn(s hour-angles. 



k2 



