The War Cry . he iwti make up for the power thus lost,they increased the pressure of steamm the boilers until one hundred andfifty pounds per square inch waaregistered, where tho Clermont hadsighed along with only seven. Underthis high pressure the engines woreoni in : jic course ul three or lour-years, while Ilia h°rd-drivcn hullolasted no longer. The sid^ wheels werefound to be in the way when goingthrough the narrow channels, and sothe engineers abandoned them for oneorg wheel at the stern. Thus the ideaof the screw propeller gradually gainedground. Ucean-Gqing the modern
The War Cry . he iwti make up for the power thus lost,they increased the pressure of steamm the boilers until one hundred andfifty pounds per square inch waaregistered, where tho Clermont hadsighed along with only seven. Underthis high pressure the engines woreoni in : jic course ul three or lour-years, while Ilia h°rd-drivcn hullolasted no longer. The sid^ wheels werefound to be in the way when goingthrough the narrow channels, and sothe engineers abandoned them for oneorg wheel at the stern. Thus the ideaof the screw propeller gradually gainedground. Ucean-Gqing the modern point of view, thespread of the steamship over the worldwas very slew. On the Greati Lakes,the first sttumer left Buffalo for De-troit in 1818. American capitalists hadbeen dreaming, meanwhile, of a. liuoof steam packets between the UnitedStates and England, and in 181 thaSavannah steamed from Savannahto Liverpool in twenty-five days. It-,vas not b. eiiininercis; success, how-ever, and not until jooa, did the. The Atlantic—The Type of Ocean-Go-ing. Steamships in the Fifties. London to New Tork, in sixteen , while Americana sent the firststeamer across the Atlantic, the Brit-ish were the first to inaugurate aprofitable over-sea traffic, and fromthat time to this, British merchantsailors hav« ruled supreme on deep?water, though the Germans are givingtt»m a race for their money in theselatfir years. Expansion Engines introduced. Within ten years after the screw substituted for the side wheels,another device for increasing speedhad been adopted. This departure wasthe eompc-tind engine, it i= 3icL-«asuryto remember first that steam does by oxpaiidini; 111 a cylinder, indpushng a piston to ana fro. Withinores^ing »!ires and increasingvolume; Ef steam Its the oSd-Ktyle ofengines, the builders merely fncreaiedthe size ot the cylinders, pistons andconnections. The result, of course. the weight «?? the various parts wasincreased enormously, as w
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