My high school physics teacher decided, for some reason, to show his class how to etch glass. He brought in a pane of glass; borrowed a bottle of hydrofluoric acid from the chemistry stockroom next door, without the knowledge of the chemistry teacher; laid the pane of glass on the sill of an open window; and drew a pattern on the glass with the acid. Things went OK for the first few minutes, but then the wind shifted and started coming in the window. The fumes were so irritating that the physics classroom had to be evacuated for the rest of the day, with a rag stuffed into the crack under the door to keep the fumes out of the hallway. The room was closed off for two days; I don't know who did the cleanup. The physics teacher kept his job, although I imagine he got a reprimand.
On August 14, 2014 3:12:49 PM CDT, JMJ <[email protected]> wrote: > On 08/14/2014 09:13 AM, John F. Eldredge wrote: > > hydrofluoric acid, one of the most corrosive > > substances known. > > Ah yes, good ol' hydroflouric acid. One of its many uses was > demonstrated in the first season of Breaking Bad. > > JMJ -- John F. Eldredge -- [email protected] "Darkness cannot drive out darkness; only light can do that. Hate cannot drive out hate; only love can do that." Dr. Martin Luther King, Jr. -- -- You received this message because you are subscribed to the Google Groups "NLUG" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/nlug-talk?hl=en --- You received this message because you are subscribed to the Google Groups "NLUG" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
