8.54 8.64 7.43 7.21 6.87 7.89 9.79 6.85 7.00 8.80 9.30 8.03 6.39 7.54 8.65 6.99 8.40 9.66 7.62 7.44 8.55 8.70 7.33 8.58 9.88 9.94 7.14 9.14 IN SPACELAB LIFE SCIENCES 2 PAYLOAD , 14 RATS WERE SELECTED AT RANDOM FROM 28 AND SENT INTO FLIGHT. WHEN THEY RETURNED, THEIUR RED BLOOD CELL MASSES WERE MEASURED. THESE ARE THE FIRST 4 LINES OF DATA ABOVE. THE LAST 4 LINES ARE THE DATA OF THE REMAINING 14 RATS THAT WERE NOT SENT INTO FLIGHT.