3Lz MARITIME OBSERVATIONS. 
Two machines for this purpofe have occurred to me,. 
which though not fo fimple as the above, I imagine would 
be more effectual, and more eafily manageable. I will 
“endeavour to deferibe them, that they may be fubmitted 
to your judgment, whether either would be ferviceable; 
and if they would, to which we fhould give the prefer- 
ence. 
The firft is to be formed, and to be ufed in the water 
on almoft the fame principles with thofe of a paper kite 
ufed in the air. Only as the paper kite rifes in the air,. 
this is to defcend in the water. Its dimenfions will be 
different for fhips of different fize. 
To make one of fuppofe fifteen feet high; take a {mall 
fpar of that length for the back-bone, AB, figure 16, a 
fmaller of half that length CD, for the crofs piece. Let 
thefe be united by a bolt at FE, yet fo as that by turning 
on the bolt they may be laid parallel to each other. Then 
make a fail of ftrong canvas, in the fhape of figure 17. 
To form this, without wafte of fail-cloth, few together 
pieces of the proper length, and for half the breadth, as 
in figure 18, then cut the whole in the diagonal lines a, 
b, c, and turn the piece F fo as to place its broad part op- - 
pofite to that of the piece G, and the piece H in like man- 
ner oppofite to I, which when all fewed together will ap-. 
pear as in figure 17. This fail is to be extended on the 
crofs of figure 16, the top and bottom points well fecured. 
to the ends of the long fpar; the two fide points d, e, 
faftened to the ends of two cords, which coming from the 
angle of the loop (which muft be fimilar to the loop of a 
kite) pafs through two rings at the ends of the fhort {par, 
fo as that on pulling upon the loop the fail will be drawn 
to its extent. The whole may, when aboard, be furled 
up, as in figure 1g, having a rope from its broad end, to 
which is tied a bag of ballaft for keeping that end down. ° 
wards when in the water, and at the other end another 
rope with an empty keg at its end to float on the furface; 
this 
