Show BOND MART ART PRICES SHOW HEAVINESS I 0 NEW V YORK May 7 The P P The bond market developed eloped distinct heaviness in some sections during late trading Tuesday Led by Postal Telegraph 58 which yielded more than 4 points domestic domestic do do- corporate bonds were offered 1 in moderate volume at concessions ranging from fractions tractions to 1 or more points and U. U S. S governments extended extended ex ex- tended early declines as much as one half point in one or two In instances in In- stances |