. The Becquerel rays and the properties of radium . Photograph of a Incandescent Gas , TAKEN BY Mr. RICHARD KeRR. THE MANTLE WAS OPENEH OUT AND LAID FLAT ON A PLATE. THE EXPOSURE LASTED FOR EIGHT DAYS. THF. THOKIUM CONTAINED IN THE MANTLE MAKES IT RADIO-ACTIVE, AND ENABLES IT TO ACT ON THE PLATE. PLATE PlIOTOGRAPU OF A PIECE OF , TAKEN ISY ITS OWNRADIO-ACTIVITY. THK PLATE WAS SIMPLY LAID IM CONTACT WITH THE IlTCH-HLENDE .SURFACK TORA WEEK AND DEVELOFED. THE PITL H-BLENDE SHOWS DARK ; THE .ASSOCIATEDMINERALS, KELSlAK, ETC., WHICH ARE NOT RADIO-ACTIVE, SHOW LIG
. The Becquerel rays and the properties of radium . Photograph of a Incandescent Gas , TAKEN BY Mr. RICHARD KeRR. THE MANTLE WAS OPENEH OUT AND LAID FLAT ON A PLATE. THE EXPOSURE LASTED FOR EIGHT DAYS. THF. THOKIUM CONTAINED IN THE MANTLE MAKES IT RADIO-ACTIVE, AND ENABLES IT TO ACT ON THE PLATE. PLATE PlIOTOGRAPU OF A PIECE OF , TAKEN ISY ITS OWNRADIO-ACTIVITY. THK PLATE WAS SIMPLY LAID IM CONTACT WITH THE IlTCH-HLENDE .SURFACK TORA WEEK AND DEVELOFED. THE PITL H-BLENDE SHOWS DARK ; THE .ASSOCIATEDMINERALS, KELSlAK, ETC., WHICH ARE NOT RADIO-ACTIVE, SHOW LIGHT. SLIGHTDARKENING CAN UE SEEN OLTSIDE THE LIMIT OF THE IlTCH-BLENDE ; THIS IS DUETO BECQUEREL RAYS IROM THE SIDES OF THE SPECIMEN, WHICH FALL ON THEOUTLYING PARTS OF THE PLATE. PLATE III.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectradioac, bookyear1906
