losis.

Group 3:

Center case;

E., Warren; died about 5 years ago, of pulmonary tubercuThe remaining group of 5 people was fully exposed. All of them show signs of infection.

Group 5: Center case;

Warren. This group of 3 people was exposed to a fatal
One of them shows signs of infection.

B., Alvarado.. This group of 5 has been exposed for a short time to an open case of pulmonary tuberculosis, which has had extensive sanatorium care and training. None of them show signs of infection.

Group 6: Center case; - S., Vega township. This group of 5 people was very slightly exposed to an open case of pulmonary tuberculosis. None of them show signs of infection.

Group 7: Center case; L., Bloomer township. This group of 12 people was fully exposed by a fatal case of pulmonary tuberculosis. Ten of them show signs of infection, and 2 are negative.

Group 8: Center case;

J., Big Woods Township. This group of 6 was exposed by a case of non-pulmonary tuberculosis. Five of them are negative, and 1 shows signs of infection. Group 9: Center case; · E., Oak Park township. This group of 5 people was fully exposed by an open case of pulmonary tuberculosis. All of them show signs of infection.

Group 10: Center case; cases of pulmonary tuberculosis.

Group 11:

to tuberculosis.

Group 12:

Center case;

S., Radium. This group of 5 was fully exposed by 2 fatal
Three of them show signs of infection, and 2 are negative.

U., Radium. This group of 4 has had no known exposure None of them show signs of infection.

Center case; F., Vega township. This group of 11 people has been exposed for a short time to an open case of pulmonary tuberculosis which has had much sanatorium care. One shows signs of infection and 10 are negative.

Group 13: Center case;

A., Radium. This group of 2 has had no known exposure to tuberculosis and both are negative.

H., Warren. This man was fully exposed to tuberculosis by He is negative.

ber Posi- Nega- ber Posi- Nega- ber Posi- Nega- cutive Exam- tive tive Exam- tive tive losis

50 per cent of those exposed to open pulmonary cases show signs of infection. None of those in the non-tuberculous groups show signs of infection. 11 per cent of those exposed to non-pulmonary forms of tuberculosis show signs of infection.

Note A report of a similar study in the city of Minneapolis of families in which there were reported cases of tuberculosis and, as a control, of a group of families in which there was no recognized case of tuberculosis, was made by Dr. Lampson in 1913. The report was published by the University of Minnesota and is entitled "A Study on the Spread of Tuberculosis in Families." -Editor.