Group 1 2 3 4 Mean 0.68 0.66 0.68 0.68 Relative Brain weight X 100 St. dev. 0.02 0.04 0.05 0.03 Mean 4.30 4.18 4.42 4.34 Relative Liver weight X 100 St. dev. 0.16 0.19 0.19 0.17 Mean 0.69 0.66 0.70 0.66 Relative Paired kidney X 100 St. dev. 0.05 0.03 0.04 0.05 Mean 21.90 21.88 18.77 20.17 Relative Paired Adrenal x 1000 St. dev. 1.56 2.01 3.30 2.21 Mean 1.13 1.07 1.13 1.11 Relative Paired testis X 100 St. dev. 0.09 0.09 0.08 0.07 Mean 0.21 0.20 0.20 0.18 Relative Thymus Weight X 100 St. dev. 0.04 0.05 0.03 0.02