Document vo0n96GpXgEDJrOVy0D0pJ76

o Composition Shoes Gas Analysis Abex Corporation Railroad Products Group HMWAH. NEW JEBSEY 07450 THj 707-529-5450 IBiX 07-55555 March 11, 1969 Mr. C. H. Borcherding, Jr. Medical Department Chicago Dear Charlie: Thank you for your letter of February 27, stating that gas sampling time will be approximately 16 minutes per shoe. We would suggest that instead of running 30 second stops, we run 20 minute- drag tests (simulating grade braking} in which the sampling could be for the last 16 minutes of each drag. This would allow k minutes for the shoe and wheel to heat up and start snaking. Bob Ely is arranging for the X-ray defraction analysis which you suggested by done by Research at Mahwah. We have Just received the Cobra and Anchor shoes from San Francisco and now have the necessary shoes. However, the dynamometer will not be available until April or as soon thereafter as you can make it. If you will confirm a date, we will finalize the dynamometer scheduling. (Original Signed) E. R. Knauer E. R. Knauer Chief Engineer ERK:ez cc - R. J. Ely K. A. Anderson C. C. Blackwell^Jr^M. D. pctrosi MAimWW ABEX CORPORATION MEDICAL DIPT, SPNY 005373 SCF-ABEX-1190