TIDAL AND GENERAL NOTES ON CATTEWATER. 
419 
in the tides, and a south by west wind causes the highest rise and 
the least fall. A sudden increase in the density of the air . . . 
will diminish, check, or nip the rise of the tides. When there is 
a rise of one inch in the quicksilver, if such rise is sudden and 
rather local, the height of the tide at high water will in proportion be 
twelve inches less. It is a popular notion that frosts nip the tides, 
and it has been commonly observed that during a sharp frost the 
tides do not rise so high . . . the actual cause is the additional 
pressure of the atmosphere . . . the barometer usually ranging 
high during severe frosts. 
"The same observation applies, only with a contrary effect, 
when the barometer falls suddenly . . . the tide in consequence 
rises so much the higher, and in the proportion before stated of 
one inch fall in the quicksilver to twelve inches increase in the 
rise of the tides. 
" Whenever a new moon or a full moon occurs on or about the 
day of the spring or autumnal equinoxes, and the moon chances to 
be in apogee at the juncture, and two of the superior planets in 
ecliptic conjunction with her also, the quicksilver very low, and a 
hard gale from the south and by west blowing at the time, this 
port is sure to be visited by a very extraordinary inundating high 
tide — a tremendous flow of waters." 
RISE AND FALL OF THE WATER AT THE BEST OR HIGHEST 
SPRING TIDES. 
e water 
her 
i Tides. 
"t* * 
fe ^ 
03 O ^ 
Moon's Age. 
Time of 
Time of 
o 
High Water. 
Low Water. 
« 2 
<D 
iw mu 
flow 
an at 
P3 ° 
05 
& 
l s 
H ^ 
tn 5 
h. m. 
h. m. 
ft. 
in. 
ft. in. 
ft. in. 
Day of full and change 
4.48 a.m. 
11.6 
a.m. 
14 
10 
4 6 
3 4 
1st day after 
5.28 „ 
11.47 
>> 
15 
9 
4 9 
4 0 
2nd „ 
6.6 „ 
12.25 p.m. 
14 
0 
3 10 
3 2 
3rd „ 
6.49 „ 
1.8 
>3 
13 
4 
3 6 
2 10 
4th „ 
7.29 „ 
1.48 
>» 
12 
9 
3 3 
2 6 
5th „ 
8.11 „ 
2.30 
» J 
11 
8 
3 0 
1 8 
6th „ 
8.58 „ 
3.19 
J J 
10 
4 
2 6 
10 
7th „ 
9.51 „ 
4.12 
J J 
8 
7 
1 6 
1 
8th 
10.46 „ 
5.11 
if 
7 
6 
6 
0 
9 th „ 
11.47 „ 
6.17 
3 3 
7 
0 
Dead of 
the Neaps. 
10th „ 
12.58 p.m. 
7.26 
3 J 
7 
1 
0 
1 
11th „ 
2.7 „ 
8.31 
>3 
33 
8 
4 
1 2 
2 
12th „ 
3.6 „ 
9.26 
9 
7 
1 9 
10 
13 th „ 
3.54 „ 
10.12 
10 
9 
2 3 
1 6 
14th „ 
4.30 „ 
10.48 
J J 
12 
1 
2 10 
2 3 
