“…The granuloma were produced by the subcutaneous injection of carrageenin solution containing 8.5 g% sulphur, as in our earlier experiment [15]. A total of 118 male rats, divided into three age groups, were used: (1) 42 'weanlings', 4-5 weeks of age, average weight 100 g; (2) 36 'young' rats (3-4 months of age, average weight 182 g); (3) 40 'adult' rats (8-9 months of age, average weight 290 g).…”