264 
MR. LUBBOCK ON THE TIDES. 
Docks (together with the Interval between the Moon’s Transits), corresponding to 
the Apparent Solar Time of the Moon’s Upper and Lower Transits, p.m. and a.m. 
Table XXI., showing the Difference in the Interval between the Apparent Solar 
Time of the Moon’s Transit and the Time of High Water, and the Mean Interval 
and the Difference between the Height of High Water and the Mean Height. This 
Table has been formed by Interpolation from Table XX., in order to ascertain the 
amount of the Diurnal Inequality. 
The moon’s parallax in Table I. and Table X. is throughout very nearly, but not 
exactly 57', and the moon’s declination in Table VI. is very nearly, but not exactly 15°. 
In strictness the interval and the height ought to have been brought up to what they 
would have been upon those suppositions. I have neglected the small quantities which 
would have been thus introduced on account of their minuteness, and on account of 
the great additional labour they would have occasioned. 
Table XXII., showing the Interval between the Moon’s Transit in the first column 
and the fourth succeeding Transit for each month of the year. 
Table XXIII., showing the Difference in the Interval between the Moon’s Transit 
in the first column and the fourth succeeding Transit for each month of the year 
and the Mean of all. 
Table XXIV., showing the Interval between the Moon’s Transit in the first column 
and the fourth succeeding for every minute of the Moon’s Horizontal Parallax. 
Table XXV., showing the Difference in the Interval between the Moon’s Transit 
in the first column and the fourth succeeding Transit, for every minute of the Moon’s 
Horizontal Parallax, and that for Parallax 57'. 
Table XXVI., showing the Interval between the Moon’s Transit in the first column 
and the fourth succeeding Transit for every three degrees of Declination. 
Table XXVII., showing the Difference in the Interval between the Moon’s Transit 
in the first column and the fourth succeeding for every three degrees of Declination, 
and that for Declination 15°. 
When the moon’s transit is at 2 h p.m., for example, <x! is greater than a, ^ is nega- 
tive, tan 2 ^ is negative, and 4* the variable quantity to be added to the apparent 
solar time of the moon’s transit or the interval (in the perfect sphere) is negative. 
Table XXVIIL, showing a Comparison between the Semimenstrual Correction at 
London in the Interval and in the Height as deduced from theory and observation. 
See Plate XVIII. 
The quantities in the following Tables, deduced from Bernoulli’s equilibrium 
theory, are taken from the Tables calculated by Mr. Jones, and given in my paper in 
the Philosophical Transactions, 1836, p. 58, with the exception of the sun’s parallax 
correction, which influences in a slight degree the calendar-month inequality. This 
correction, omitted before, is now given in Tables XXXIV. and XXXV. 
The theory correction has been calculated by Mr. Jones with the following con- 
stants : log {A) = 9-5841774 D = 16 ft -69 log ( E ) = -6468993. 
