Favorite this☆ Air-cooled cylinder, Knox automobile Description: View of an air-cooled cylinder for a Knox car. Typed on back: "Air-cooled cylinder used on early Knox model. Note the porcupine effect of the cooling pins; a peculiar but very effective arrangement." Handwritten on back: "Knox." Details Resource ID: na045027 Subject: Automobiles--Motors Knox Automobile Company Photographic prints Date Issued: Unknown year Format: 1 photographic print ; 6.25 x 7.5 in. Member of: National Automotive History Collection Filing Location: Knox Rights: Physical rights are retained by DPL. Copyright is retained in accordance with U.S. copyright laws.