Period

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The hours of the day : the morning
LKO12A00_148

The hours of the day : the morning

The periscope
LKO07031_200

The periscope

Fridtjof Nansen
LKO09A01_221

Fridtjof Nansen

Man observing the cathodic light spectrum
LKO09A00_249

Man observing the cathodic light spectrum