Ball — Harmonic Tidal Constituents of Port of Dublin. 191 
The several sheets S, 0, M are then prepared in accordance with 
the rules for harmonic analysis. This is conducted by General 
Strachey's method, and the final results, using the language of the 
harmonic notation, are as follows : — 
Tides. A„ = 7'06. 
= 4-38 
314°. 
Lunar Semidiurnal^ M2 | 
Solar Semidiurnal^ '^a | Z 3550' 
k" - 356° 
Lunisolar Diurnal^ JTi | Z 1 640' 
Solar Diurnal y P | _ 164°' 
Lunar Diurnal. . ... . . . oi^" ~ ^o^^ ■ 
The sheets S, 0, M, and the four harmonic reductions, are here 
ippended. 
