821 
PLATE © 
RECORD | EDGE ON 
yn Nun Tre EWE A caUGe FACE PERPENDICULAR TO 
WATER SURFACE. 
INSULATION: TELCOTHENE 
REMOVED- SLAYERS OF 
RUBBER TAPE ONLY. 
RECORD @ FACE ON 
WANA A a A le oe 
° 
RECORD 3 EDGE ON 
AU AA A A ee! INSULATION: RUBBER 
Aer SOLUTION ONLY. 
EDGE ON 
GAUGE FACE PERPENDICULAR 
RECORD 4 SO WATER SURFACE. 
YAVIVAVAYAVAYAYAVATAVAYACATAYAATAUIVAYAYATAVATAVAVAVAVAPIVAYANS 
SINGLE PLY GAUGE Ye"’DIA.x 44" THICK. 
ANNEALED COPPER ELECTRODES O-022”“THICK 
CEMENTED BY “GELVAT 
ALL CHARGES /4LBS. STANDARD T.N.T. 
