EXPLANATION OF SYMBOLS USED IN THIS BOOK 
Although the following list is fairly comprehensive, some of the 
symbols given may at times be used in the text to represent other 
quantities not listed below, but such application will be made clear 
by the context. 
A 
o 
Ci 
ve) 
ae} 
(1) General symbol for a tidal constituent or its amplitude. It is some- 
times written with a subscript to indicate the species of the constituent 
(par. 52). 
(2) General symbol with an identifying subscript for a constituent term 
in the development of the lunar tide-producing force (par. 66). 
(3) The particular tidal constituent being cleared by the elimination 
process (par. 245). 
(4) Azimuth of tide-producing body reckoned from the south through 
the west (par. 80). 
(5) Azimuth of horizontal component of force in any given direction 
(par. 85). 
(1) Speed or rate of change in argument of constituent A. 
(2) Mean radius of earth. 
(1) Tidal constituent following constituent A in a series. 
(2) General symbol with an identifying subscript for a constituent term 
in the development of the solar tidé-producing force (par. 117). 
(3) General symbol for disturbing constituents in elimination process 
(par. 245). 
Speed or rate of change in argument of constituent B. 
(1) Mean constituent coefficient (par. 74). 
(2) Comer symbol for coefficients of cosine terms in Fourier series (par. 
187). 
Reciprocal of mean value of 1/d. 
Reciprocal of mean value of 1/d). 
Declination of moon or sun. 
Distance from center of earth to center of moon. 
Distance from center of earth to center of sun. 
(1) Mass of earth. 
(2) Argument of tidal constituent (same as V+). 
Eccentricity of moon’s orbit. 
Eccentricity of earth’s orbit. 
Reduction factor, reciprocal of node factor f (par. 78). 
Horizontal component of tide-producing force in azimuth A. When 
numerals are annexed, the first digit (3 or 4) signifies the power of the 
parallax of the moon or sun involved in the development and the second 
digit (0, 1, 2, or 3) indicates the species of the terms included in the 
group. ‘Thus F439 represents that part of the horizontal component in 
azimuth A that comprises the long-period terms depending upon the 
cube of the parallax. 
South horizontal component of tide-producing force. (See F, for explana- 
tion of annexed numerals.) 
Vertical component of tide-producing force. (See F, for explanation of 
annexed numerals.) 
West horizontal component of tide-producing force. (See F, for explana- 
tion of annexed numerals.) 
Node factor (par. 77). 
(1) Greenwich epoch or phase lag of a tidal constituent (par. 226). 
(2) Gear ratio of predicting machine (par. 396). 
(1) Mean acceleration of gravity on earth’s surface. 
(2) Modified epoch of tidal constituent, same as x’ (par. 225). 
Mean amplitude of a tidal constituent (par. 1438). 
311 
