Abstract :
MR. KIRKWOOD: I think Mr. Macdonald has done us a very great service in emphasising that the materials which production engineers usually think of are not nearly so limited as some of us have imagined. The use of resinoid material is somewhat strange to most of us, and from what he has shown us, we will have to know more about it in future. I think the film and his remarks have shown that we have got to learn how to utilise this material to its best advantage. In connection with machinability and lack of specifications calling for a proper machinability value, I would like to ask Mr. Macdonald if he has any views on the specification, which I now believe is called for by the armament people for rifle bore material.
