examination) are routinely made by breaking plate glass (newer knives may be made of diamond).
http://www.2spi.com/catalog/knives/glass.shtml http://www.pelcoint.com/glass_html/glassacc.htm And here I thought that Babbage's method was meant to be a joke. Gordon At 09:18 7/28/03 -0600, Rodney E Heil wrote:
In ~1988, I attended a lecture at the University of Colorado on the topic of breaking glass. A professor there had studied the subject in depth. I think he was an archeology professor who started by studying how Native Americans made arrowheads (obsidian being very similar to glass). He might have had a grant from the medical industry, because he proposed scalpels made of broken glass for delicate eye surgery. It turns out that broken glass is 100 times sharper than a razor blade. On Mon, 28 Jul 2003 [EMAIL PROTECTED] wrote: > Andrew James wrote: > > >According to Charles Babbage in his autobiographical "Passages from the > >Life of a Philosopher" (I think, or possibly the "Ninth Bridgwater > >Treatise" - it's many years since I read it) there is a simple technique > >for making a neat hole in a glass sheet using only a centre punch and a > >hammer (gently!).
Gordon Uber [EMAIL PROTECTED] San Diego, California USA Webmaster: Clocks and Time: http://www.ubr.com/clocks -
