SECURE SAILING OR LIFE BOAT. 129 



may be filled with cork shavings, and by thaf means, if 

 the boat should happen to fill by any accident, she cannot 

 sink. 



In the boat I have altered for Government, the balance Boats altered 

 bodies {if the interior of the boat was filled with water) ^/g^t?''^'^"" 

 would exclude as much water, between the inside of the 

 boat and the outside, as is equal to a body of water of 1 tun, 

 17 cwt, 2qrs, which is a great deal more than the weight of 

 men that will go in her, consequently they can run no risk 

 whatever of being drowned ; and even if she had a hole 

 through her bottom, she would always keep a sufficient 

 height out of the water either for rowing or sailing. 



But the main object is to make her sail and row much 

 faster than other boats, and both on calculation and trial my 

 boat will be found to sail much faster, and with much less 

 danger than other boats. 



I now come to the advantage of rowing.— As the balance Adrantage of 

 sides project a foot beyond the resisting part in the water, jowmg with a 

 there is that leverage on the boat (over a common one), and 

 also the same in the length of the loom of the oar, that 

 is in the inside from the gunwale of the boat, which allows 

 the whole of the oar to be lengthened, and by that means 

 it describes a larger circle in the water, and makes a longer 

 pull : the oars for the Government boat I have made are 

 lengthened from 14 to 18 feet. 



The experiment of having two spars fixed at a distance This may be 



from a boat's gunwale, and the oars to work from them, ^^^5^®*^ ^^ 



. projecting 



has often been tried and found to answer, but this has a spars. 



great advantage over that method. 



There is another advantage or property which this boat Will not roll, 

 has, she cannot roll at sea, but always keeps a level position f^^.^'l^ ^''*^^ 

 aa far as the surface of the se.i will allow; she may heel but 

 not roll, as the balances are always ready to catch either 

 way, and the opposite one assists the other bv its weight out 

 of water and gravitation ; neither can this boat pitch like 

 aYiother, for the balance bodies being out of the water, and 

 the breadth of six feet only in the water, it can only act 

 with" a gravity on the water, equal to a boat of the weight 

 of six feet but as the resistance of the water upwards equal 

 to a boat of eight feet wide. 



Vol. XXI— Oct. 1808. K Or 



