The Acid Tests Testing were a series of parties Social_event held Hold by author Ken Kesey primarily in the San Francisco Bay Area during the mid-1960s , centered entirely on the use Using of , and advocacy of , the psychedelic drug LSD , also known as `` acid '' .

The name `` Acid Test Testing '' was coined Writing by Kesey , after the term `` acid test Testing '' used Using by gold miners in the 1850s .

Kesey took the parties to public places , and advertised Commerce_sell with posters that read Communication , `` Can you pass the acid test ?

`` , and the name was later popularized Expansion in tom wolfe 's 1968 book , `` the electric kool-aid acid test Testing '' .

The soldiers threw Body_movement some of the bodies into the river and reportedly threw acid on others , making an exact death Death toll impossible to confirm Check , but more than two hundred were reported Reporting missing after the incident by surviving family members .

Heavy seas near Lázaro Cárdenas in western Mexico caused Causation a ship , which contained Containing sulfuric acid , to leak .