Chemical No. 1 [San Francisco Fire Department]. Called "chemical" because soda and ash, activated by acid, was used to put out smaller fires. [Duplicate of 6:19.] :64

Courtesy of UC Berkeley, Bancroft Library

http://www.oac.cdlib.org/ark:/13030/tf2m3nb2q5/?order=1

Title:

Chemical No. 1 [San Francisco Fire Department]. Called "chemical" because soda and ash, activated by acid, was used to put out smaller fires. [Duplicate of 6:19.]

Contributing Institution:

UC Berkeley, Bancroft Library