ay pressure only. This was because of a failure in the photo initiation cireutt or the thermal link causing the gage to start before shot time. A total of three "q" gages out of 14 also ran before shot time from the same reasons mentioned in the previous paragraph, Of the 38 pressure-time gage records 6 are considered not reliable for plotting pressure vs distance curves because of the small] amplitude of the records, extreme oscillations or a slow rise time caused by the clogging of the pressure inlet hole. The "q" page records are almost a complete loss because the orientation of the detonation caused the shock wave to strike the gages at odd angles, some from the rear, some from broadside and q some from the front at large angles. No explanaticn is offered at present for the variation of the pressure along the reef stations from those measured on the land stations. Whether this is a true phenomenon or a function of the gage mount will have to be determined at a later date. DELETED Ce gio® : \