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THE POPULAR SCIENCE MONTHLY.
Ozone, or some agent nearly resembling it, is often produced when oil of turpentine is exposed to the air, and this circumstance may perhaps
Fig. 3.—Ficus Elastica; a Specimen growing in the Open Air at Paris.
explain the destructive influence which oil of turpentine occasionally exercises on India-rubber.
Exposure to sunlight often causes the destruction of India-rubber, either converting it into a soft and sticky substance, or into a hard
