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[[image - two negatives covered by white sheet of paper (back of the article in scan 42)]]

human visual acuity cannot resolve such closely spaced lines.  However, under unusually high magnification, one can observe a lenticular pattern

90[[degree sign]]F for prolonged periods of time.  Be sure to use them before their expiration date.  In no case should any Polaroid film be frozen.

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Personal Notes

[[on film]] Jones [[/on film]]

[[image - blurry aerial view of building - perhaps on negative]]
Denver, Co

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[[image - black negative]]

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