TIDAL OBSERVATIONS. 



367 



21. In the averages for any one of the S, K, L, M, IS., 0, &c. tides ex- 

 plained above, the influence of each of the others is nearly eliminated because 

 of the greatness of the number of periods (roughly 360 and 720) of each in 

 the series of observed heights included in the summations. The choice of the 

 approximate period 369^ S"", as explained above (§ 17), makes as little as 



Table of Compaeative Meak Soiae and Meak Ltjnar HorEs. 



Hour M (y-o-). 



1 2 



5 6 7 8 9 10 11 



12 13 14 15 16 17 18 19 20 21 22 23 



o 

 I 

 2 

 3 

 4 

 5 

 6 



7 

 8 



9 

 10 

 II 

 12 

 '3 

 14 



15 

 16 



17 

 18 



19 



20 



21 

 22 

 23 



16 

 IS 

 13 

 15 

 14 

 15 

 16 



15 

 16 

 16 



15 

 17 

 16 



15 

 17 

 15 

 17 

 17 

 16 

 16 

 14 

 14 

 16 



14 



16 



15 



14 



15 1 



13 



15 



16 



14 

 16 

 16 



15 

 17 

 16 



17 

 17 

 15 



17 



15 

 16 



17 

 15 

 15 

 IS 



13 



16 

 14 



IS 



16 



14 

 16 



15 

 14 

 16 



14 



IS 



17 

 15 

 17 

 16 



15 

 16 



IS 



16 



17 



IS 



16 



]6 

 14 



'5 

 16 



14 

 15 

 16 



14 

 16 



'5 

 14 

 t6 



14 

 >S 

 [6 



14 

 16 



16 16 



17 

 17 

 IS 

 16 



IS 



15 

 16 



14 



IS 



15 

 13 

 16 



IS 



14 



13 

 15 

 16 

 16 



17 

 16 



15 

 17 

 16 



15 

 16 



17 

 16 



17 

 16 



15 

 16 



14 

 IS 



16 

 14 

 15 

 14 

 14 

 16 



14 



IS 



15 

 13 

 16 

 16 

 16 



IS 17 



15 

 16 

 16 



^^ 

 17 



IS 



if 

 16 



15 

 17 

 16 



13 

 15 

 14 



IS 



16 



14 

 16 



IS 



14 

 16 



14 

 15 



17 



■5 

 16 



16 

 14 

 17 

 16 



15 

 16 



IS 



16 

 17 

 15 

 16 

 16 



IS 



17 

 14 

 14 

 16 



14 

 16 



IS 



14 

 16 



14 



IS 



14 

 16 



14 

 16 



17 

 16 



17 

 16 



15 



17 



IS 



17 

 17 

 15 

 16 



14 

 14 

 16 



14 

 15 

 15 

 13 

 16 



15 



14 



14 

 16 



14 



IS 



16 



IS 



17 

 16 

 16 

 17 

 15 

 16 



17 

 15 

 17 

 16 



IS 



15 

 13 

 15 

 16 



14 



