How did they torture Mr. Corey to try to get him to talk?

I'll assume you're talking about Giles Corey from "The Crucible." If not, I'm sorry!

In the last act, it is revealed that Giles Corey was pressed with large stones on his chest for not telling the court who told him that Putnam was accusing people just for more land. He refused to tell, so they continued putting stones on his chest. His last words were "more weight."