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Title: PH meter, type TF 717 A/M made by Marconi Instruments Ltd., [Go to resource]
Description: PH meter, type TF 717 A/M made by Marconi Instruments Ltd., (serial no 7234 184), mains operated, c. 1950 License: http://creativecommons.org/licenses/by-nc-sa/2.5/ Subjects: pH meter Temporal: 1950 Source: Science Museum Creator: Marconi Instruments Ltd. Identifier: 1982-845 Go to resource More Like this...
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