820 



Static Electricity. 



60439 60441. 1:8 1:12. 



60442 60463/69. 1:16 



60448 and 60449. 1:10-1:17 



60450 60453. 1:101:18. 



Cl. 570H, 21 in. 

 2137, i?:i3. 



