Transportation on Water 363 



floating palace. With its wireless communication, it publishes 

 a daily paper gjving the news of the world to its passengers a 

 thousand miles from land. 



In size the steamship now measures as much as 950 feet in 

 length and 100 feet in width, with a displacement of 60,000 to 



FIG. 128. A modern steamship ; steel hull, oil burning, Parsons' turbines, 

 and triple screw propellers. 



65,000 tons. It is altogether probable that the 1000-foot liner 

 with 100,000 tons displacement will be an early achievement 

 in boat building. 



160. Use of steam in navigation. The application of steam 

 power to ocean navigation is as full of romance as is that of 

 steam and water power to the generation of electricity in present 

 industrial life. Many methods have been tried. An old boat 

 had paddles fixed on frames which moved them after the fashion 

 of oars in the hands of oarsmen. The paddle wheels gradually 

 took on the form of those used to-day on side-wheelers and 

 stern-wheelers for river and ferry traffic. The connection of 

 the power developed by the engine was made with a walking 

 beam from the cylinder to the crank on the wheel. To-day 

 where a light draft is necessary paddle boats are employed. 

 For deep water another means of propulsion has been developed. 



The screw propeller is employed exclusively on ocean steamers 



