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Concentration of Fe, Zn, Cu and Pb were determined in the brain tissue of wild (bean goose, Anser fabalis, n = 14, and white-fronted goose, A. albifrons, n = 3) and domestic (A. anser f. domestica, n = 13) geese. The results are referred to 1 g fresh weight (micrograms/g). Out of 17 wild geese, 4 individuals showed a very high Pb level. Statistically significant differences in concentrations of the metals studied were found between the white-fronted and domestic geese; for 3 metals (Fe, Zn, Cu), differences between the bean and white-fronted geese were statistically significant as well. The two bean goose types, tundra and taiga, were found to differ in terms of their brain Zn and Cu concentrations: the tundra type geese showed higher content of the metals than those in the taiga type.

Growth relationships between spleen and liver weights and body weight and CR length as well as between weights of liver and spleen in fetuses (145 males, 141 females) of black-white cattle. According to their body weights, the fetuses were divided into 4 growth groups: I, to 1000 g; IIa, 1000-3490 g; IIb, 3500-7990 g; III, over 8000 g. The relationships were described using appropriate allometric growth equations (log Y = b log X + A) derived both for individual groups and for the entire fetal period. Relative weights of the organs studied and the liver-spleen coefficient (L/S) were determined as well. The results are presented in equations, tables, and graphs.

Growth and bilateral asymmetry of thyroid gland were studied in 291 fetuses (from 219 to 31,300 g) of the black-white cattle divided into 4 groups according to body weight. Relation between body weight (X) and thyroid weight (Y) was described using allometric equation Y = aXb. Allometric coefficient b was different in each of the four groups (1.198; 1.179; 1.314; 0.941) and amounted to 1.076 for the entire fetal period. The coefficient of fluctuating asymmetry of the thyroid gland decreased with increased fetal weight in the following way: 0.16; 0.10; 0.09; 0.07; this coefficient amounted to 0.02 for all the fetuses examined.

68 bovine fetuses of both sexes (37 males, 31 females) from early developmental stage (80-990 gm) were studied. The coefficient of the absolute heart weights (42.4%) and the relative heart weight (0.76%) were described. Body weight (125.9 gm) were given when the heart of the fetus reach 1 gm. For the relation between body and heart weight were found following equation: logY = 0.958 logX--2.009 and plotted on double logarythmic paper. The results from bovine fetuses were compared with analogical data for water buffalo and camel (Berg, Taher, Moustafa).

The weight heart Y-weight body relationship was studied on 219 Black-White cattle fetuses (107 females and 112 males; weight range of 1000-31,300 g). 1. The relationship in the consecutive growth periods are described by the following regression equations: middle fetal period (IIa and IIb)--IIa (n = 88, weight range 1000-3490 g) logY = 0.97 logX -- 2.05, r = 0.96; IIb (n = 68, weight range 3500-7990 g) logY = 1.04logX -- 2.29, r = 0.89; -- late fetal period III (n = 63, weight range 8000-31,300 g) logY = 1.07logX -- 2.39, r = 0.98. 2. The relationship for all fetuses, together with I prenatal period (earlier work of these authors) examined is described by the regression equation (n = 287, weight range 80-31,300 g) logY = logX -- 2.13, r = 0.99 (r -- correlations coefficient). 3. The relative heart weights are attained: IIa -- 0.72%, IIb -- 0.71%, III -- 0.77%.