If you want bigger fire, smoke and explosions, go to a professional "magic" show.
----- Original Message -----From: Anthony NoceSent: Monday, September 30, 2019 6:46 PMSubject: Re: [DCHAS-L] [EXT] Re: [DCHAS-L] Letter to the National PTA regarding the rainbow flame demoBigger is NOT better?
Says who?I've heard arguments to the contrary...
Sent from my iPhone - please excuse any typos(518) 466-5608
----- Original Message -----Sent: Saturday, June 22, 2019 9:15 AMSubject: Re: [DCHAS-L] Letter to the National PTA regarding the rainbow flame demoOne thing I notice about this letter and many other comments about this demonstration directed to educators is the frequent absence of guidance on how to perform it more safely, or on alternative, less hazardous, demonstrations that would illustrate the same principles.
In my experience, it is usually more effective to provide alternatives than to simply say "don't do that."
Decades ago, my then boss at Princeton University used to say to faculty members something along the lines of "I am not telling you that you can't to that; I am telling you that you can't do it in the way you have been accustomed to doing it."
Peter Zavon, CIHPenfield, NY(on location in Cincinnati, OH)--- For more information about the DCHAS-L e-mail list, contact the Divisional membership chair at membership**At_Symbol_Here**dchas.org Follow us on Twitter **At_Symbol_Here**acsdchas
-----------------------------------------From: "davivid"
To: DCHAS-L**At_Symbol_Here**PRINCETON.EDU
Cc:
Sent: Friday June 21 2019 6:36:30PM
Subject: [DCHAS-L] Letter to the National PTA regarding the rainbow flame demo
Here is a letter I just emailed to the National PTA. Let's hope this
helps get some progress on the issue.
Dave Lane
Principal
Clavis Technology Development
-------- Forwarded Message --------
Subject: Dangerous classroom demonstration
Date: Fri, 21 Jun 2019 15:31:09 -0700
From: davivid <davivid**At_Symbol_Here**well.com>
To: info**At_Symbol_Here**pta.org
Dear PTA Gatekeeper
I write to call your attention to a common classroom demonstration that
injures students in several incidents every year. I hope that the PTA
can help end this practice by informing parents and schools of the danger.
The demonstration is typically called the "Rainbow Flame" or similar. It
involves solutions of various metal salts dissolved in alcohol that are
set on fire. The different metal salts give various colored flames,
hence "rainbow flame". If alcohol is poured near flame or other ignition
source the alcohol can suddenly erupt from the bottle in a phenomenon
called "flame jetting". The jet of flaming alcohol can severely burn
anyone in the path of the flames even as far as ten feet away.
Here are some links describing flame jetting.
https://www.youtube.com/watch?v=5sfUl6GIdYo
/> Small Bottle, HUGE Fireball (How Flame Jetting Works)
https://www.youtube.com/watch?v=FkOX91tRb04
/> Dangerous =E2=80=98Flame Jetting' Phenomenon Kills Hundreds Every Year
Here are links to some recent instances of flame jetting that have
injured students
https://www.washingtonpost.com/news/education/wp/2015/11/11/this-chemistry-fire-demonstration-has-repeatedly-burned-students/?noredirect=on
/>
https://nypost.com/2019/06/18/student-injured-in-science-class-recalls-hopelessly-burning-alive/
/>
https://www.pritzkerlaw.com/personal-injury/2017/rainbow-fire-science-experiment-hospitalizes-6-tx-preschoolers/
/>
https://www.nytimes.com/2014/01/04/nyregion/school-experiment-that-burned-boy-was-focus-of-federal-warning.html
/>
https://nypost.com/2019/06/20/teacher-of-chemistry-lab-gone-wrong-neglected-safety-protocols-expert/
/>
Here is information on making classroom demonstrations safer
https://cen.acs.org/articles/93/i46/Make-Chemistry-Classroom-Demonstrations-Experiments.html?PageSpeed=noscript
/>
http://ameriburn.org/prevention/stop-the-flame/
/>
https://www.acs.org/content/acs/en/chemical-safety/basics/flame-jetting.html
/>
https://www.acs.org/content/dam/acsorg/about/governance/committees/chemicalsafety/publications/ccs-chair-rainbow-demonstration-cen-comment.pdf
/>
https://www.youtube.com/watch?v=kkBFG1mTSBk
/> A Safer "Rainbow Flame" Demo for the Classroom
I ask your help in making classrooms safer for all students.
Thank You
Dave Lane
---
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