ARCTIC SEAS. — APPENDIX, PART II. 655 



Using these values in the expression for the Lunar Semidiurnal Tide (assuming iin=i„), 



we find 



2M=4-23x 008^(17° 42'), 



2M=4-62xcos'(8°43'); 



from which we find 



2M=4-66 



2M=4-72 



V 



Mean=4-69 ft. 



This value of 2M, the lunar coefficient, should be substituted for that found in p. 260, 

 viz. 4*309 ft., and used in the subsequent calculations of pp. 261, 262. The corrected 

 results stand thus : — 



1. Value of ^=0-3636. 



2. Mass of Moon=^7-^. 



OD 3d * 



3. Mean depth of sea from Heights=9-84 miles. 



4. Mean depth of sea from Times =2"71 miles. 



I 



MDCCCLXVI. 4 X 



