lvania Institution, for two
years:[21]

CAUSES OF DEAFNESS OF PUPILS IN PENNSYLVANIA INSTITUTION

1906 1907
PER CENT PER CENT

Total number 510 100.0 500 100.0
Born deaf 213 41.8 206 41.2
Scarlet fever 43 8.2 47 9.4
Meningitis 36 7.1 40 8.0
Falls 24 4.7 25 5.0
Diseases of ear and throat 13 2.6 23 4.6
Catarrh and colds 13 2.6 -- --
Measles 18 3.5 18 3.6
Brain fever 17 3.3 16 3.2
Convulsions 14 2.8 13 2.6
Abscesses 10 2.0 12 2.4
La grippe 10 2.0 7 1.4
Accidents (not stated) 9 1.8 7 1.4
Whooping cough 7 1.4 7 1.4
Typhoid fever 7 1.4 6 1.2
Diphtheria 6 1.2 6 1.2
Mumps 5 1.0 5 1.0
Paralysis 5 1.0 4 0.8
Marasmus 2 0.4 4 0.8
Pneumonia 4 0.8 2 0.4
Dentition -- -- 2 0.4
Dropsy of blood 2 0.4 -- --
Chicken pox 1 0.2 1 0.2
Poisoning 1 0.2 1 0.2
Intermittent fever 1 0.2 1 0.2
Blood clotting on brain 1 0.2 -- --
Cholera infantum 1 0.2 -- --
Gastric fever -- -- 1 0.2
Sickness (not stated) 10 2.0 8 1.6
Unknown 37 7.3 38 7.6

POSSIBLE ACTION FOR THE PREVENTION OF ADVENTITIOUS DEAFNESS

In respect to present activities for the prevention of adventitious
deafness, we find the situation very much like that of marking time.
Deafness, since the beginning of time, has largely been accepted as the
portion of a certain fraction of the race, and any serious and
determined efforts for its eradication