The causeway as built in its present form cost approximately $1,000,000. The additional cost of doing this experiment this second way was estimated as follows: Causeways built up to 30!', 20!', & 10! (including concrete conduits and man- holes) 9000! Coaxial Cable @ $10.00 per ft. Total $1,000,000 90,000 $1,090,000 "This was rejected and the helium filled box was chosen as being the less expensive of the two." ROY B. SNAPP Secretary