A8 U. S. COAST AND GEODETIC SURVEY 
tide of the same speed, this has been treated solely as an elementary 
constituent. Constituent MSf represented by term A; of formula (62) 
has the same speed as a compound tide of formula S,—M>. This con- 
stituent is relatively unimportant and it makes little difference whether 
treated as an elementary or a compound tide. Following the pre- 
vious practice in this office it is treated in the harmonic analysis as a 
compound tide with corresponding argument and node factor. When 
included in the computation of tidal forces, however, the argument 
and node factor indicated in table 2 should be used. 
