Obvious typographical errors have been silently corrected.

The cover was prepared by the transcriber and is placed in the public domain.

Issued March 17, 1911.

U. S. DEPARTMENT OF AGRICULTURE,
BUREAU OF ANIMAL INDUSTRY.—Bulletin 132.
A. D. MELVIN,Chief of Bureau.

A BACTERIOLOGICAL STUDY OF HAM SOURING.

C. N. McBRYDE, M. D.,
Senior Bacteriologist, Biochemic Division.