Technical Bulletin from A. K. Lever & Co. Pty. Ltd., manufacturers of 'Nulon' Nylon Bearings & Bushes. Headings include: General Characteristics, Co-efficients of friction for Nylon on steel, Chemical Resistance, Water Absorption, Condition of material, General, Lubrication, Load and Speed, Heat Conductivity - Wall thickness, Thermal Expansion, Fitting and Wear - Running in,sciences, bill ashman collection - correspondence, a k lever & co pty ltd, nulon nylon bearings & bushes technical bulletin, mcpherson's limited