400. That’s an error.

Google cannot redirect you to http://www.chapitre.com/frame_rec.asp?donnee_appel=PRINTGOOGLE&titre=Zeitschrift+des+K%C3%B6niglich+Preussischen+statistischen+Bureaus because the request was invalid.

This might be because the link was created a long time ago. Try your search again on Google. That’s all we know.