“…The sodium arsenite injection was performed in the same way as the sodium arsenate injection. Bulk aqueous samples were taken at times 0 (immediately prior to injection), 4,7,8,9,10,11,13,15,17,19,30,60,120,180,240, 300, 360, 420, 1440, 2880, 4320, 5760, 10080, 14400, 20160 and 30240 minutes. Coupons were removed at 1.33, 10.25, 22.5, 39.75, 72.…”