Surface Accurac Nnd Lubrication

W HEN two surfaces have been designed for relative motion, such as a shaft in its bearings, a piston in its cylinder, or a gear tooth with a mating tooth, accuracy of dimension......

'aspe'cts Of The Synthetic Rubber Position

Many of Our Readirs. Should be Interested in the Points Raised by Dr. Pickles in His Paper Read Last Tuesday Before th: Royal Society of Arts M ANY of our readers are vitally......