Show I 1 after calling callin g attention to the fact tha eliat t man was content with th use ilse of oil to keep machinery in ruti running niu order until lie he began to ride the bleyle bicycle when lie Jein some better labor saver and invented ball bearings the scientific american proceeds to illustrate and describe some recent applications of such sih bearings they are employed fur dagou and carriage wheels fur for the carrier wheels of vable cable roads and fur for tile the shafts of swift machinery they practically dupen e with till tile hie use ilse of tha oil can an and greatly reduce u duce iho amount of friction to be overcome tit thui US to the effective power of all iu in which they are used the i fact Is noted that prof buys boys of london shi shu shaved owed ved experimentally that ball bearing s when properly constructed ire practically proof against wear ile he demonstrated this fact by eig bighill elgh hill ln tile tie 13 balls alls 0 afi f 1 nei cle bea ri jig when alion they were new aud aid again after they hail had been subjected subject 41 to long service they ili no loeri of N eight |