Prof. A. D. Bache on Tidal Observations. 355 
TABLE No. XII. 
Showing residuals after correcting for new computations of ordinates, and difference 
: bet dinates, 
ween high water and maximum ordin 
os Cc ti f residual Residual. Corrected residual. 
hours. feet. feet. feet. 
4 It 22 “11 
14 — 02 a &: Il 
as — 08 “15 07 
34 —12 “13 ol 
44 ey -08 —'04 
54 peers "02 08 
—'I0 ‘OI —-08 
7 — ‘08 03 —'05 
8s —:05 03 
93 —‘09 12 03 
104 —-I0 Il ol 
iit —'‘07 16 09 
Mean... :017 
when the quantities were more considerable. Diagram No. 6 
shows this fact ; containing the curve of residuals from Tables 8 
nee in the form of the residuals affords 
the best evidence that the irregularities of the observations, and 
changes in the mode of computation, do not introduce errors of 
sufficient magnitude to mask the laws of the phenomena. I pr 
pose therefore to modify the original hypothesis, so as if possible 
to obliterate this form in the residual. 
Southern declinations, are shown in the next table ; 4 
were equal, the heights 
would not differ appreciably. _ 
TABLE No. XUL 
Showing the mean value of twice the moon’s declination, and th or resp ding 
mum satosobe for northern and southern declinations. 
Sine 26’. 
. 
THALC 
ye ' 
Maximum ordinate. 
eee ae eee 
Sine 23. | Maximum ordinate. 
Sas SE Le Le ee 
“410 621 
531 
