3 I walls with an old tarp lining, as a protection against frost. Mac established the meridian line there with his theodolite. Captain Cone and I set up the frame - got Small helped adjust the steady mass in equi- lilibrium, I put on the arms, dirmm etc. The iron sub-bases rest on frozen gravel and are imbedded in the same material. I packed sand a- round them and then poured on water so that the connection is frozen solidly together. 19-X Got mechanism to running by removing all oil from the bear- ings and worm of the weight screw and the worm of the drum. Am burning a kerosene stove in the room to reduce the cold there. 20-X Running experimentally Full damping. 21-X Informed Mr. Mac Miller that the seismograph was now running "officially" - but by afternoon the time record was out of gear because the electromagnet did not work properly. No shocks recorded. 22-X - No record, shots magnet not doing well.