John P. McNabb tests carbon monoxide levels, Los Angeles, 1936
- Description:
- Cleo the canary was used to measure levels of carbon monoxide in tunnels, which can prove to be very dangerous to those who are more susceptible to the gas. Company secretary of the testing facility Colonial Mutual Compensation Insurance Company John P. McNabb will be submitting the test results to the Health Department and other sectors.
- Date:
- March 11, 1936
- Resource Type:
- still image
- Collection:
-
Los Angeles Times Photographic Collection
