To classify furthercutting machines may be divided into those wherein the tools move and the material is fixed, and those wherein the material is moved and the tools fixed, and machines which involve a compound movement of both the tools and the material acted upon.(1.) Name some of the principal points to be kept in view in preparing designs?(2.) Why should attempts at designing be confined to one class of machinery?(3.) What objection exists to examining references when preparing designs?Theres an airplane in thereit looks to be an amphibianI see pontoons! Larry stated."I have been arrested."Aristotles objections to the Neo-Pythagorean theory of ideal numbers need not delay us here. They are partly a repetition of those brought against the Platonic doctrine in its338 original form, partly derived from the impossibility of identifying qualitative with quantitative differences.234