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Inter-Office Memo ' CONFIDENTIAL TENNECO CHEMICALS, INC. To Q. C. Manual Holders From h. B- Carr Subject Revision to Manual At At Burlington Date July 31, 1969 Copy to Attached is a revision of Raw Material Specification, Method No. 3-82 in Section 3 of your manuals. Please note the following correction: Refractive Index @ 25'C: 1.4436 - 1.4447 changed to 1.4430 - 1.4440 Please discard copy dated May, 1969. HBC/rjl COLORITE 015975