UNITED STATES DEPARTMENT OF LABOR
JAMES J. DAVIS, Secretary
BUREAU OF LABOR STATISTICS
ETHEI RERT STEWART, Commissioner

BULLETIN OF THE UNITED STATES } N 51 yA |
BUREAU OF LABOR STATISTICS °° * * 0.

SAFETY CODE SERIES

CODE FOR IDENTIFICATION
OF GAS-MASK CANISTERS

NATIONAL SAFETY COUNCIL, SPONSOR

AMERICAN RECOMMENDED PRACTICE
Approved January 7, 1930
AMERICAN STANDARDS ASSOCIATION

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MARCH, 1930

UNITED STATES
GOVERNMENT PRINTING OFFICE
WASHINGTON : 1930

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