churchill's shocking use of chemical weapons, page-8

"What hysterical nonsense.
Diphenylaminechloroarsine is called Adamsite and it is a riot control agent, not a nerve gas."


You are correct.

"Adamsite (DM) is a vomiting compound that has been used as a riot-control agent (military designation, DM). It is released as an aerosol. Adverse health effects due to exposure to adamsite (DM) are generally self-limited and do not require specific therapy. Most adverse health effects resolve within 30 minutes. Exposure to large concentrations of adamsite (DM), or exposure to adamsite (DM) within an enclosed space or under adverse weather conditions, may result in more severe adverse health effects, serious illness, or death."

from:
http://www.cdc.gov/niosh/ershdb/EmergencyResponseCard_29750017.html