Date: Mon, 27 Nov 2006 17:18:16 -0500
Reply-To: Don Abramowitz <dabramow**At_Symbol_Here**BRYNMAWR.EDU>
Sender: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
From: Don Abramowitz <dabramow**At_Symbol_Here**BRYNMAWR.EDU>
Subject: Re: Water Hammer Hazard
In-Reply-To: <3C6EE2B43CB1F248A13F58A419EEA13811B0DE**At_Symbol_Here**>

>What is this device and what is it suppose to do?  Water hammer like in
>condensation induced water hammer in steam systems?

 From the following web site, where you can see a picture of one of these:,+Glass_E_ 

"This is a demonstration your students will want to see again and 
again-water inside the vacuum tube falls and sounds like a hammer 
hitting a nail. The 25cm-long all-glass hammer has a bulb at one end, 
is filled with water, evacuated and vacuum sealed. The water falls 
just as a solid would, making a surprising clank as it hits bottom."

I've never seen or heard one, but it looks like it should break if 
you shake it hard.  Seems like it ought to be made of plastic.

Donald Abramowitz, CIH
Environmental Health and Safety Officer
Bryn Mawr College
Bryn Mawr, PA

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