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pH Scale
PHARMACEUTICALS
pharmaceutical accessory
Nyberg, V. J.
Europe: Finland, Kirvu
Early-Mid 20th c.
cardboard; paper
overall: 100 mm x 88 mm

Set of pH scale indicator papers for the determination of hydrogen ion concentration, especially for determining the acidity in gastric juice and urine. (Also useful in connection with eyedrops and in contact lens practice). 9 sets of paper strips: Phenol Red, Thymol Blue (2), Brom Phenol Blue, Methyl Red (2), Phenol Red, Congo Red (2).


2009.414

Gift of Mr David Evershed-Martin, FCOptom, 2009



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