Figure l Age-related change in lymphocyte transformation in peripheral blood cultures showing the mean percent transformation for each decade with standard deviation. Figure 2 Age-related changes in the blood elements [total leukocytes (WBC), neutrophils, hematocrit, lymphocytes, platelets, and sedimentation rate} showing the mean level for each decade with standard deviation. Figure 3 Age-related changes in serum proteins [total serum proteins, albumen, alpha-1 globulin, alpha-2 globulin, beta globulin, and gamma globulin] showing the mean level for each decade with standard deviation. _ Figure 4 | Age-related changes in immunoglobulin [G(IgG), A(IgA), D(IgD) , M(IgM), lambda light chains, and kappa light chains] showing the mean level for each decade with standard deviation.