Re: Grade Conversions

[G.Lambert@unsw.edu.au (Geoff Lambert)]

Graham Fry <fryg@sydpcug.org.au> wrote:

>As a die-hard steam nut I am reading the best steam book I have ever
>found on steam - David Wardale's "The Red Devil and Other Tales from the
>Age of Steam". This book is all about his projects to increase the
>efficiency and reliability of South African steam by using a lot of the
>principles and theories of the South American steam engineer LD Porta.
>The book is over 500 pages of technical info, drawings, tables with only
>minimal photos - wonderful. However, he constantly refers to grades in
>percentages. 

Actually, I think most of the refrences in Wardale's book are in "per
mil"- if that's the right term, viz it looks like 2 oo/oo, which is 2
in 1000 or 0.2%.

Geoff Lambert