UNITED STATES DEPARTMENT OF LABOR 
JAMES J. DAVIS, Secretary 
BUREAU OF LABOR STATISTICS 
ETHELBERT STEWART, Commissioner 
BULLETIN OF THE UNITED STATES |, | | N 512 
BUREAU OF LABOR STATISTiCS 0. 
SAFETY CODE SERIES 
CODE FOR INFHTIFICATION 
<7 CANISTERS 
OF GAS. 
NATIONAL SAFETY COUNCIL, SPONSOR 
—— 
AMERICAN RECOMMENDED PRACTICE 
Approved January 7, 1930 
AMERICAN STANDARDS ASSOCIATION 
* 
a" 
8p aed yr 
Lares of) 
MARCH, 1930