Hardcover, Very Good. Fourth Edition. Excerpt from The Practice of Lubrication: An Engineering Treatise on the Origin, Nature and Testing of Lubricants, Their Selection, Application and Use The Chief Engineer or Master Mechanic of a works cannot be expected to know everything there is to know about lubrication; it is no discredit to him if he gains a few points by discussing the lubrication of his plant with lubricating engineers who have made a life study of the subject.