HART-JOHNSON BOUT.San Francisco, Cal., March 27—Marvin Hart, of Louisville, and Jack Johnson, the clever heavyweight fighter, will meet in a twenty-round bout before the Hayes Valley club tomorrownight and the Hart crowd is displaying a great deal of confidence over theoutcome. Hart has trained with Jimmy Britt as a sparring partner and is in first class condition. The same is said of Johnson, who has been doing his practice work in company withJack McCormick and Denver Ed Martin. Interest in the fight is increased by the opinion that the winner will probably contest with Jeffries at an early date for the heavyweight championship.