819 
PLATE 4 
RECORD la. FACE ON. 
. i 2 oe on i oe nm ee 
RECORD Ib. OPPOSITE FACE ON. 
ee ee os 
TWO PLY GAUGE Ve” DIA.x 
V4." THICK EACH, 
RECORD 2a. EDGE ON. SUTTER AND CENTRAL 
ELECTRODES— STEEL 
O-OOIS “THICK. 
RECORD 2b OPPOSITE EDGE ON. 
eeouescecusauvessuaes @ 
RECORD 3. FACE OWN. 
VV AAA 
SINGLE PLY GAUGE 
Va"DIA.x “4 THICK 
a en OUTER ELECTRODES 
AAA O-25"THICK STEEL. 
ELECTRODES CEMENTED WITH ‘GELVA’ 
INSULATION: LAYER OF TELCOTHENE AND 3 
LAYERS OF RUBBER TAPE. 
1Y4LBs. TN.T STANDARD CHARGE. 
