ph Meter (per hydrogen IONS). A meter for testing the pH of soil or liquids etc. "7" is neutral. Below 7 indicates acidity. Above 7 indicates alkalinity. One balances the state of the medium by either adding acid or alkali. Used by the School of Agriculture, UWA prior to 1950. Label on rear of box: "BATTERIES changed 5TH NOVEMBER 1950". Trade label inside lid gives marks:"N.L. JONES / MODEL B pH ELECTROMETER / MELBOURNE". Long list of instruc- tion on care and use of meter. Address of manufacturer at bottom: "N.L. JONES / 195 BAY RD. SANDRINGHAM S.8, VIC./ TELEPHONE / PRIVATE XW 4100".
Department:
History DepartmentCollection
History Collection
Collection Item Data
Accession Number: | H1991.187 |
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Accession Date: | 21 Oct 1991 |
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Material
Wood/Wood | wood, paper, metal, plastic, glass
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Plastic/Synthetic/Polymer |
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Measurement
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