Letter from Wallace and Tiernan Ltd. to Mr P. W. Miller describing how to test the dashpot and calibrate the span of the feeder with attached plans of the feeder.
Letter of reply regarding A61906 Self Powered Feeder
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- ReferenceGB 3132 THOM-021
- Dates of Creation4 June 1976
- Name of Creator
- Physical Description3 copies of the letter with attached plans
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