Roger Hi, I have the later G H Thomas Book if you would like to borrow it ,Please send me you address to my Email address and i can post it to you. Yours John Burridge Tel No 01491-833009 -- Whatever you Wanadoo: http://www.wanadoo.co.uk/time/ This email has been checked for most known viruses - find out more at: http://www.wanadoo.co.uk/help/id/7098.htm 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.