ARCTIC SEAS.— PAET III. FREDEEIKSDAL. 



643 



Substituting for 2S and 2M their values 1328 and 3693, we find 



1328 (13-648-/5;)=0-47288 x 3693(12-778-^), 

 or 



, 22315 — 18124 ^r^f\o ^^ /t-tt \ 



^= 1746-1328 =^Q'Q^ "^'^^^ (^"•) 



4. Dept?i of the Sea deduced from Times. 



The depth of the sea derivable from the retardation of times caused by friction, is 

 given by the equation 



(6) 



Lunitidal Acceleration 13'815— 4A: 



Solitidal Acceleration 12-938—4* 

 But, from (III.) and (IV.), we have 



Lunitidal Accelerations 6 12-2 53= + 199, 

 Solitidal Acceleration =6 0-725=— 85. 



Hence we find 

 and 



199_ 13-815 -4* 

 ■ 85 — 12-938-4^' 



4A;=^-^^|^= 13-200 miles, 

 ^=3-30 mUes, (VIII.) 



Parallactic Inequality at Frederiksdal, 1863-64. 



Springs. 



10 ft. 



Oft. 



8 ft. 



7 ft. 



6 ft. 



5 ft. 



4 ft. 



3 ft. 



2ft 



"Winter 

 Solstice 

 1863. 



Summer 

 Solstice 

 1864. 



10 ft. 



9 ft. 



8 ft. 



7 ft. 



6 ft. 



5 ft. 



4 ft. 



3 ft. 

 2 ft. 



