M. HONORÉ is a member of the staff of L'Illustration, and his book is virtually an enlarged edition of a series of articles which he contributed to that journal. It therefore gives an attractive and ...
Paris, février 1896. Henri Becquerel pose des sels d’uranium sur des plaques photo, en attendant le soleil. Trois jours plus tard, surprise : les plaques ont noirci. Sans lumière, sans soleil, l’urani ...
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