I used to be on some of these Yahoo groups, but found it too time consuming. In general I am against posting copyright material, but the Geometer series are certainly valuable information for novices, and indeed for most people. The other information is also valuable. It is a shame that Model Engineer does not repeat those old articles. I am sure they would be popular. alan@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx www.alanstepney.info Model Engineering, Steam Engine, and Railway technical pages. ----- Original Message ----- From: "Len Smith" <parnobal2@xxxxxxxxxxxxxxxxxxxx> To: <modeleng@xxxxxxxxxxxxx> Sent: Friday, August 06, 2004 11:38 PM Subject: [modeleng] Could be useful I asked permission to forward JW Early's note that appeared on another list, cos I thought there it might be useful to members. Len Smith .................................................................... MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.