Here is another post from that history list.

This could be a contact person for all of you facing similar problems.

Feel free to contact Ralph. He lives in Richmond, Virginia.

Dann Hayes
Grinnell College
Grinnell, Iowa

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I am an explosive engineer, also a mechanical engineer.  I have extensive experience in the measurement of vibration from blasting as well as other sources i.e. construction.  If you desire you can pass my name and email address to the person inquiring, and I'll try and help.

Ralph M. Reese
[log in to unmask]

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