"N" RAYS 



A COLLECTION OF PAPERS COMMUNICATED 

 TO THE ACADEMY OF SCIENCES 



WITH ADDITIONAL NOTES AND INSTRUCTIONS FOR 



THE CONSTRUCTION OF PHOSPHORESCENT 



SCREENS 



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CORRESPONDENT OF THE INSTITUTE OF FRANCE 

 PROFESSOR IN THE UNIVERSITY OF NANCY 



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INGENIEUR E.S.E., LICENCIE-ES-SCIENCES 



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