Quoting from Frey Scientific's 2002 catalog: "This device demonstrates an unusual property of water in an evacuated cylinder. When held in vertical position with bulb at top and lifted and lowered in 1 quick motion, water will fall in the tube making an amazingly loud sound. Showing that in a vacuum, water behaves like a solid-moving as a whole. 10"Lx1"dia. 1 1/2"bulb." Ruth Ann Murphy -----Original Message----- From: DCHAS-L Discussion List [mailto:DCHAS-L**At_Symbol_Here**LIST.UVM.EDU] On Behalf Of Greene, Ben Sent: Monday, November 27, 2006 3:27 PM To: DCHAS-L**At_Symbol_Here**LIST.UVM.EDU Subject: Re: [DCHAS-L] Water Hammer Hazard What is this device and what is it suppose to do? Water hammer like in condensation induced water hammer in steam systems? Ben Greene Chemist -----Original Message----- From: DCHAS-L Discussion List [mailto:DCHAS-L**At_Symbol_Here**LIST.UVM.EDU] On Behalf Of Dan Crowl Sent: Monday, November 27, 2006 2:18 PM To: DCHAS-L**At_Symbol_Here**LIST.UVM.EDU Subject: Re: [DCHAS-L] Water Hammer Hazard Ruth, My physics teacher in high school had the same result the first time he used the device in class! That was in 1966! I bet it is the same device! Dan Crowl Professor of Chemical Engineering Michigan Tech University Houghton, MI Murphy, Dr. Ruth Ann wrote: > Dear CHAS Members: > > A water hammer (lecture demonstration device) broke this month when > lowered, sending glass flying in my classroom. The water hammer is > designed to make a loud noise when properly lowered; however this > hazard, previously unknown to me, should require strict warnings for > its use, or the substitution of something safer. > > Ruth Ann Murphy, Ph.D. > Chemistry Dept. Chairperson and Professor The University of Mary > Hardin-Baylor 900 College Street Belton, TX 76513-2599 Phone (254) > 295-4542 Fax (254) 295-4237 > >