18 U. S. COAST AND GEODETIC SURVEY 
of June 1934, illustrates the mixed type of tide in which the inequality is featured 
principally by the high waters. 
For the month represented in Figure 6, the high waters averaged 0.59 foot above 
sea level, and the low waters averaged 0.69 below sea level, giving an average range 
of 1.28 feet. If we take the higher high waters and lower high waters separately, we 
get an average height for the higher high waters for the month of 1.24 feet above sea 
level, and for the lower high waters 0.10 foot below sea level. Hence, the difference 
between the higher high and lower high waters for the month averaged 1.34 feet, which 
is 0.06 foot greater than the average difference between the high waters and low waters 
June lst 
Fic. 6.—Tide curve, Honolulu, June 1934. 
for the month. If we average the heights of the lower low and higher low waters for 
the month separately, we derive values of 0.89 foot and 0.47 below sea level, respectively. 
The average difference in the heights of lower low and higher low waters is thus 0.42 
foot or less than one-third the difference between the higher high and lower high waters. 
In Honolulu time, the moon was over the Equator on the 4th and 19th of the 
month represented in Figure 6, and at its maximum semimonthly declination on the 
11th and 26th. The tide curve shows that about the times the moon was over the 
Equator, the difference between morning and afternoon tides was least, while about 
the times the moon was in the tropics, the difference was greatest. The greatest differ- 
ence in height between the two high waters of a day during the month occurred on the 
