120 JOURNAL OF THE PLYMOUTH INSTITUTION. 
KISE AND FALL OF THE WATER AT THE WORST 
SPRING TIDES. 
Moon's Age. 
Time of 
xiign water. 
Time of 
Low Water. 
Rise and fall 
of the Tides 
perpendicularly. 
)w much the water 
flows higher 
lan at Neap Tides. 
dw much the water 
falls lower 
lan at Neap Tides. 
W ^ 
M ~ 
h. in. 
h. m. 
ft. 
in. 
ft. in. 
ft. in. 
Day of full and change 
4\48 a.m. 
11.6 
a.m. 
13 
1 
1 11 
2 9 
1st day after 
5.28 
11.47 
9 f 
13 
11 
2 7 
2 11 
2nd „ 
6.6 
12.25 p.m. 
13 
6 
2 7 
2 6 
3rd „ 
6.49 
1.8 
}» 
13 
2 
2 7 
2 2 
4th „ 
7.29 
1.48 
J > 
12 
4 
2 3 
1 8 
5 th „ 
8.11 „ 
2.30 
J > 
11 
2 
1 11 
10 
6th 
8.58 „ 
3.19 
j i 
10 
6 
1 7 
6 
7th 
9.51 „ 
4.12 
5 5 
9 
5 
9 
3 
8th „ 
10.46 ,, 
5.11 
5 > 
8 
9 
4 
0 
9th 
11.47 „ 
6.17 
? J 
8 
5 
Dead of 
the Neaps. 
10th „ 
12.58 p.m. 
7.26 
5 > 
9 
9 
6 
10 
11th „ 
2.7 „ 
8.31 
J ) 
10 
10 
1 1 
1 4 
12th 
3.6 „ 
9.26 
12 
1 
1 7 
2 1 
13th 
3.54 „ 
10.12 
13 
1 
2 1 
2 7 
14th 
4.30 „ 
10.48 
3 J 
13 
10 
2 7 
2 10 
Mr. Blackburne has also recorded some interesting notes touching 
the encroachment of the sea at Mount Batten. For several years 
he occupied the field there as a place for laying timber. On the 
side of the field next the Sound the Admiralty had placed three 
upright stones "along the lowest part of the field, not far from 
the edge of the cliff .... with a view to ascertain the actual 
progress of the encroachment of the sea on the low neck of land 
in times to come. Fears were in fact entertained for the ultimate 
security of the harbour of Catwater, many acres having been 
washed away to the south-east of the old sea wall within the 
memory of man, and the soil being at length washed away from 
behind the sea wall. The wall itself from being thus left exposed 
to the depredation of the sea at high tides gradually yielded to it, 
and a great part of it had at the juncture been entirely washed 
away." 
On the 24th December, 1807, Mr. Blackburne carefully measured 
the distances from the edge of the cliff to each of these stones. 
The distance from the edge to the north -westernmost stone was 
then 39 feet; to the middle stone 37 feet 6 inches ; to the south- 
easternmost stone 26 feet 6 inches. Twenty-six years subsequently, 
