274 



Paralysis, 231, 232 

 Paramecium, 30-32, 35, 40, 72 

 Parental correlations, 171, 172, 174, 



176 

 Parents and offspring, duration of 

 life of, 155-157 

 longevity of, 158, 160 

 Paris, 202-206 

 Parr, T., 24 



Parthenogenesis, artificial, 51-58, 223 

 Pascal, 82 



Pearl, R., 106, 201, 225, 249, 265 

 Pearson, K., 19, 87-91, 93-101, 166, 



169-177, 179, 182, 183, 225, 229, 



238, 259, 266 

 Peerage, 167, 169, 172 

 Pennaria, 62 

 Physical characters, inheritance of, 



174, 175 

 Pituitary gland, 220-222 

 Pixell-Goodrich, Mrs., 28 

 Planaria dorotocephala, 34, 35 

 Plants, senility in, 44 

 Ploetz, A., 178, 179, 182, 183, 225, 



266 

 Population, 240-258 

 Potassium cyanide, 53, 54 

 Poverty, 202-208 

 Premature birth, 121, 123 

 Preventability of diseases, 162 

 Pritchett, A. S., 247, 266 

 Progress, evolutionary, in longevity, 



87-94 

 Prolonging life, 17, 54, 218, 221 

 Prostate, 126, 219 

 Protozoa, 30-33, 40, 41, 46 



immortality of, 30-33, 41, 

 64, 71 

 Prussia, 244, 245 

 Puberty glands, 217-219 

 Public health work, eflfects of, 112, 



227-242 

 Purulent infection, 231, 232 



INDEX 



Quaker records, 171, 173 



Babbit, 68 



Rat, 61, 212, 213, 218 



Ratio, death-birth, 243-246 



Ray, L. A., 69, 70, 220, 221, 266 



Reed, L. J., 247, 249, 266 



Registration Area, U. S., 106, 108, 



109, 139, 140, 164, 229, 245, 246 

 Reproduction, organic, 33, 41 

 by budding, 37 

 by fission, 32, 33, 41 

 clonal, 37 

 sexual, 37-40, 41 

 Reptile, longevity of, 22 

 Respiratory system, 107, 108, 110, 



112, 119, 120, 136, 137 

 Results, summary of, 223-227 

 Richards, H. A., 86, 87, 266 

 Ritter, W. E., 75, 266 

 Robertson, T. B., 69, 70, 220, 221, 266 

 Rockefeller Foundation, 238 

 Institute, 52, 61 

 Role of bacteria in duration of life, 



43, 199-202 

 Roman Africa, expectation of life 



in, 92 

 Rome, expectation of life in, 90-92 

 Romeis, B., 219, 266 

 Rose, W., 238, 239, 241, 266 

 Roumania, 235 

 Roundworm, 39 

 Royal families, 177 

 Rubner, M., 213, 214, 226, 267 



Saleeby, 183 



Sanitation, 227, 235 



Sao Paulo, 106, 108-111, 139, 140 



Sea urchin, 52, 54, 57 



Selection, effect of, on expectation of 



life, 94 

 Selective death rate, 177-185 

 Seneca, 102 



