PARALYSIS AT VARIOUS AGES, 1891.
| Under 20 years, 1 person in every |
2,804 was paralyzed |
| 20 to 40 years, 1 person in every |
2,902 was paralyzed |
| 40 to 60 years, 1 person in every |
568 was paralyzed |
| 60 and upwards, years, 1 person in every |
149 was paralyzed |