Nurses' Papers on Tuberculosis : / read before the Nurses' Study Circle of the Dispensary Department, Chicago Municipal Tuberculosis Sanitarium

by Chicago . Municipal Tuberculosis Sanitarium. Dispensary Department

2. Of syrupy consistency

3. Mixes with water in all proportions without producing any turbidity

4. Keeps indefinitely, but not advisable to use brands older than one year.

Boullion Filtrate—B. F. Denys—1907.

Method of preparation same as Old Tuberculin, with the exception of subjection to heat;

B. F. is a filtered, unconcentrated culture.

Contains less peptone and less glycerine than Old Tuberculin.

Contains no substances extracted from tubercle bacilli by heat.

Some toxic substances may be more active (not having been subjected to heat).