Jim, You often refer to the logarithmic hyperspiral. What is that? Could you give some examples? -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.322 / Virus Database: 267.2.0 - Release Date: 5/27/2005 -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.322 / Virus Database: 267.2.0 - Release Date: 5/27/2005