Sent: Monday, July 1, 2002 11:57 AM
To: Hollis Humphries
Subject: Great Job!Hollis, just read the TNT Newsletter that you mailed to me... Wanted to compliment you on some fine work! Since this Liberty Bell NDT project, I have read everything that I could get my hands on for "The Bell". And, it is my opinion that your article really tells a great story for the NDT community. Thanks. Lou Truckley
Lou,Your compliment is truly high praise. You and Ira were both very generous to allow me the opportunity to interview you about your work on the project. It was an interesting subject. Thank you again, I couldn't have done it without your help.
Hollis
To: Hollis Humphries, TNT Editor
Date: Monday, August 5, 2002 12:01 AMSubject: Testing the Liberty Bell
Dear Mr. Humphries:
The article "TNT Focus: Testing the Liberty Bell" in Vol.1, No.3 issue of The NDT Technician was quite interesting. However, I would like to make several comments. First, such a lengthy article should list the name of the person who wrote it, even though it might have been the Editor. It should also be written in a more scholarly format, citing references. I think such an article intended to appeal to technicians provides a good format to pique their interests and encourage further reading for those who want to improve their knowledge.
Perhaps you are wondering what references I am referring to. The first and foremost is the article "How They Did It — Radiographing the Liberty Bell" which appeared in Materials Evaluation, Vol.34, No.2, February 1976, pp. 14A-18A, and 26A. As the article states the idea of radiographing the Liberty Bell was conceived by Ralph E. Turner of Eastman Kodak and former ASNT President. Radiographs were taken to evaluate the structural condition of the bell in preparation for the bicentennial when the bell was to be moved to a
different location for better public access to view it. Contrary to the caption of the first figure in the TNT article, the same radiograph in the 1976 article states that "Fourteen sheets of film measuring 52 inches by 7 feet were exposed at one time with radiation from 670 curies of cobalt-60 to make the Liberty Bell radiograph....The 14 radiographs thus produced are believed to be the largest ever made on single, intact sheets of film."The other NDT performed on the Liberty Bell at that time was acoustic emission monitoring performed by Harold L. Dunegan. The work was reported in an article entitled "Listening to ...the Liberty Bell" in a Dunegan/Endevco AE Application Report dated August 1976. This AE test was also published as a brief news item entitled "No Noise from Liberty's Flaw" in NDT International, Vol.9, No.5, October 1976, p.257.
Sincerely,
Thomas F. Drouillard
ASNT Fellow, AEWG Fellow
From: Hollis Humphries
Sent: Monday, August 5, 2002 8:07 AM
To: Drouillard
Cc: Paul McIntire
Subject: RE: Testing the Liberty BellDear Mr. Drouillard,
Thanks for the input concerning the feature article in our July issue of TNT. I remember your excellent contribution to the acoustic emission volume of the NDT Handbook and am gratified to know you are a reader of TNT. Paul and I meet daily to discuss work on the newsletter and I promise we will revisit the issues of attribution and reference citations.
With best regards,
Hollis Humphries
Editor, TNT
Copyright © 2012 by the American Society for Nondestructive Testing, Inc. ASNT is not responsible for the authenticity or accuracy of information herein. Published opinions and statements do not necessarily reflect the opinion of ASNT. Products or services that are advertised or mentioned do not carry the endorsement or recommendation of ASNT.IRRSP, NDT Handbook, The NDT Technician and www.asnt.org are trademarks of the American Society for Nondestructive Testing, Inc. ACCP, ASNT, Level III Study Guide, Materials Evaluation, Nondestructive Testing Handbook, Research in Nondestructive Evaluation and RNDE are registered trademarks of the American Society for Nondestructive Testing, Inc. ASNT exists to create a safer world by promoting the profession and technologies of nondestructive testing.