29. Solving a chemistry problem

29. Solving a chemistry problem

3. Determine the area of normal exposures and the contrast of the photographic plate according to the following data:
logH 0.5 0.75 1.0 1.25 1.5 1.75 2.00 2.25
S 0.12 0.30 0.6 0.93 0.13 0.163 1.93 2.05

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