404. That’s an error.

The requested URL /bookmarks/mark?op=edit&output=popup&bkmk=https%3A%2F%2Fwww.practicalmachinist.com%2Fvb%2Fshowthread.php%3Ft%3D383018&title=Shaft+for+the+Boston+Elevated+railway++1899 was not found on this server. That’s all we know.