Vince Bracciale rode four winners yesterday at Laurel Race Course, including Hail Emperor in the feature race. Bracciale also won on Assault Landing, Reason It Out and Hard Hit.

Backers of Hail Emperor had a few anxious moments when an objection was lodged by Dan Foley, rider of the third-place finisher, Princely Sport. However, the stewards allowed the finish to stand. Hail Emperor paid $5 and topped a 5-6 exacta with On Watch that paid $29.

Negotiations between managements of the Maryland tracks and the race track employes' union will resume today at 1 p.m. The last formal meeting between the groups was Dec. 15.

The major issue is money, since the tracks have been alowed to raise their take of win, place and show bets from 15 to 17 percent. The tracks involved are Bowie, Laurel, Pimlico and Timonium.

The tracks have trained a backup labor force to take the place of the approximately 600 union employes should there be a strike following expiration of the current agreement at midnight Friday.

Laurel General Manager Ken Schertle said yesterday: "Laurel plans to operate on Saturday, Jan. 1, no matter the outcome of tomorrow's talks." Said Gil Feldman, chief negotiator for the union: "We've backed away from our original demands. We've compromised plenty. If the tracks don't do better, we may have a strike, one which nobody wants."