Discussion on "Recent developments in the measurement and control of surface roughness" at the Birmingham Section of the Institution

MR. E. P. EDWARDS (Section President) : After listening to Mr. Shaw´s excellent paper, and his final wind-up with a quotation from Oliver Wendell Holmes, I rather think we ought to regard him as something of a Sherlock Holmes in regard to surface roughness. I am sure Mr. Shaw has put forward contentious matter. I am rather wondering why, as I do not use colloidal graphite in my car, the damn thing runs at all, particularly after seeing those Himalayas, although I derived some comfort from the fact that they are not really Himalayas, but are stretched out until they are more like the Clent Hills. One thing that struck me as being very interesting is the effect of colloidal graphite on corrosion, and this is a point quite new to me. I don´t know whether any of the members present are aware of this, but it seems to me very interesting. May I ask Mr. Shaw how he arrived at those deductions, which he very carefully told us were deductions and not records, where he showed what might be described as turned-over tops and apparent undercutting from burnishing ?