Phil, Mag. Ser. 6, Vol. 7, Pl. XIV. 

Fie. 8, 


SSS ee ee eT ee ee ee 

ty 
5 
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sAAAARRAAALABBARAABASSTLSLLERELS ERE ELLE RABEELEES SECEBLSANS SEER EBEEREBEEEEERBENS RENN 
, 
WL, 

—Alumimnium Fotl- 
— Radioactive Substarce— 
{AWARENESS URE RENE US VELRRARRL AL ERERREAANAR RUBS LEER BRE BRERA RR ERES EER EIR REET BEY 
= Earth 


pparatus, 
A 
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