

 NAVIGATION. 127 



The following is the armament of the Caledonia : 

 On the gun deck she carries 52 guns 32 pounders. 

 Middle deck .... 34 24 



Upper deck 34 24 



120 guns. 

 Her proper complement of men is 875. 



The Commerce de Marseilles. 



Gun deck 208 feet; keel 172; breadth 54 feet 

 9J inches; depth 25 feet; burden 2747 tons. 



Chinese Junks. 



The Chinese junks are partitioned into water- 

 proof divisions, so that although there may be a leak 

 in one, it does not affect the others. 



The Log Line. 



The log line used on board his Majesty's ships is 

 48 feet long, and the sand glass runs 28 seconds. 



Steam Boats. 



The first American steam boat that completely 

 succeeded was launched at New York the 3d Octo- 

 ber, 1807. 



The first steam boat brought into use in Great 

 Britain, was the Comet, in 1812, with an engine of 

 only three horse power, being intended for passen- 

 gers. 



In 1823, the Soho, of 510 tons, plying between 



