Transferred 23X. Seismograph room is the one that has been used heretofore as the meat room - "refrigerator" the boys called it. It is at the north corner of the house and is a part of the shed running along the south west and northwest sides of the main house. Room is 7'3" (NW-SE) by 5'9" (SW-N.E.) and from about 6' high N.W. side to about 7' high on S.E. side against the house. 887 floor is the solidly frozen ground, composed of delta-fan gravel containing many pebbles. This was leveled off approximately, then the feet for the instrument were imbedded in it and fastened securely by freezing in, water being poured into the gravel that had been disturbed during the setting of the iron cups. The ground of this room does not melt