“a 
of the Coast of the United States on the Gulf of Mexico. 8 
curves and with generally coincident results. The graphical 
method besides being less laborious is free from the hypothesis 
of the sine curve. These decompositions were made chiefly by 
Messrs. Fendall and Heaton of the tidal party, and occasionally 
by Prof. Pendleton and Mr. S. Walker. 
That the diurnal wave is the principal feature, in these tides 
will appear from the annexed table (No. 1) which gives the 
TABLE 1. 
Height o Height of = Height of 
Stations. semi-diurnal| diurnal , observed 
tides. tides. | tides, 
ee 3 ae 
Cape Florida, ociice0ieck ses 16 02 15 
Indian Key, 19 06 18 
Rey Weil, So aie. 12 0-7 1-4 
Tortugas, ° 10 10 12 
Egmont Key, ..... ses eye 11 16 14 
Cndnr Reyes it's scans i nt 24 25 
St. Marks, 2°2 18 2-2 
St. George’s Island, ......... 02 16 I 
Pensacola, . 02 11 ‘0 
Fort Morgan (Mobile Bay), ... 02 11 ‘0 
Cat Island, 03 13 3 
South-West Pass, .......... 02 12 | 
=p Dernivee Isle 35 Kass. vi O-4 16 a 
Ca . 1:3 15 Vd 
Galveston, 05 pas | 6 
| Aransas, ob 13 Bf 
| razos Santi 3 0's 09 
names of the tidal stations; the average rise and fall of the 
TABLE 2. 
Tide stations on the Gulf of Mexico, the results of which are discussed in this paper. 
Kind ; 
2 
Stations, Date of Observation, 
1 Cape Florida, Fla, April 22, to Oct. 81, 1854. 
2/Indian Key, « iJ 
3K 
855./S. RK, |C. T. Thompson. 
}Box. G. Wiirdeman. 
<4 do. 
11/Cat Island, La, | Dee. 29, 1847, to Feb, 13, 1849. 
12 South W. Pass, La.|Nov. 19, 1852, to Mar. 28, 1853, 
i April 5, to June 12, 1853. 
_ * Self-registering tide gauge. 
