What was found
SMOKE IN CABIN DURING TAKEOFF. REJECTED TO. SMOKE CEASED AND DIS SI PATED. REJECT AT 50 KTS CAPT STATED APU WAS OFF, RT AND LT PACK TURNED OFF PER A CHECKLIST. LT PACK WAS THEN TURNED BACK ON AND A SMALL AMOUNT OF SMOKE WAS EMITTED. LT PACK TURN OFF. F/O STATED HE THOUGHT IT WAS A SMOKE SMELL AND CAPT STATED A SLIGHT HINT OF ELECTRICAL IN HIS OPINION. PERFORMED 10 MINUTE HIGH POWER RUN WITH ENGINE BLEEDS ON AND BOTH PACKS ON HIGH IAW AMM 72-00-00-100-803-F00 AND 05-51-26 NO SMOKE OR ELECTRICAL SMELL THROUGHOUT THE AIRCRACT . NOTICED FOG COMING FROM VENTS ( THIS IS NORMAL WHEN COLD AIR IS MIXED WITH A WARM AIRCRAFT)