310 On the Tides of Key West. 
The results are in apparent time, the substitution of which for 
mean time was, however, appreciable in but a slight degree. 
There are several small corrections suggested by the hypoth- 
esis which has been adopted, but the small value of the residuals 
renders the following of them up unnecessary. To the last 
their true place, and the mean lunitidal interval differs twenty- 
five minutes from the truth; adding this quantity, it agrees, as It 
should do, with the former determination. 
For the reason just assigned, these numbers would require cor- 
rection before using them to determine the constants. ‘This, 
when made, gives the result as before stated. 
Diurnal tides. 
The maximum ordinates found for the diurnal tides from the 
decomposition of the curves of observation were grouped accord- 
one. For (E)=9h. 30m., the high water ordinate is 0°79, the 
maximum, provided, as in the case at Key West, the time of 
high water may be taken as that of the semi-diurnal wave. 
The following table shows the moon’s declination, the corres 
ponding mean maximum ordinate, twiee the high water ordinate 
deduced from this, (which is the diurnal inequality from our 
mode of reduction,) the diurnal inequality as usually obtained, 
and the difference. 














TABLE No. 6, 
eg oes a eee eee ae 
Sine twice 1s / a : Cae nee Diiference, 
; 1 saa a Ma Paes igri es = ore —— Leow 1c" 0). 
feet. feet. Teck, ig ey feet. 
11 0°12 * 920 019 il 
21 Tt 27 28 “Ol 
35 28 “44 44 00 
48 38 59 60 ‘01 
es “46 T1 70 -“0l 
66 ‘Bl 80 79 cor a 
69 “b4 84 83 aes 
ot 
Ss Waar See ae 
