Note A — Chapter IV · STATISTICS OF PLUMBISM[A]
Reading edition
Calculated on return of employment for 1907.
[B] Calculated on return of employment for 1904.
[C] Calculated on return of employment for 1900.
Reading edition
Calculated on return of employment for 1907.
[B] Calculated on return of employment for 1904.
[C] Calculated on return of employment for 1900.