422 Sea Log and Sounding Machine. 
tlie bottom, cried, ‘stop/ to a third person who held the 
watch. 
Time of descent. Fathoms. 
2 seconds 2\ 
21 - — — e 
\8 - — — — 
5 — 8 
5i — 81 
6 10 
S 10 
7 m 
Taken when under sail, 
hour. 
Time of descent Fathoms. 
7i seconds 11 J 
n - 
— u\ 
74 — 
Hi 
7i - 
- 12 
71 
121 
8 
— 13 
8i 
— 134 
6 
— 10 
upwards of five knots in the 
Several captains and masters in the navy have made 
trial of the log and sounding machine, and given very fa- 
vourable reports of their performance. Of these the two 
following may be selected as specimens, 
San Josef, 1 2th December , 1806. 
Having several times, and in different depths and rates 
of sailing, tried Mr, Edward Massey’s patent sounding 
machine, which is, in my opinion, a most excellent in* 
vention, as correct soundings were gained in fifty-five fa- 
thoms, with a strong breeze, going six knots, by only 
passing the lead to the quarter-boat, attaching a hand 
lead about thirty fathoms from the machine, (which I 
think, is in such cases necessary :) and about ninety fa- 
thoms of line out : at another trial, to compare the old with 
the new method, going five knots and a half, correct 
soundings were ascertained by the machine in fifty -two 
fathoms, by passing the line to the main-chains, when we 
could barely get the depth in the old way, by carrying 
|lie lead to the spritsail-yard, notwithstanding the im- 
