15- 3-XII. Off 9:48 a.m No record Temp 34° min 14.5° On 9:50 Paper began to run off the drum at 2:44 a.m. and was one brief off when removed. Clock 10 min 30 sec slow (R.C. count) Less than ½ sec change in 13 days, as compared with The museum chronometer 4-XII. Off 9:57:30 a.m. No record Thermometer removed} On 9:59:06 to weather bureau station } 5-XII Off 10:56:06 No record On 10:57:30 Wound + set clock at 12:07:12, with chronometer by Mac Millan's count. 6-XII - Off 10:42:30 a.m. No record On 10:48:04 a.m. Temp 11° by Per- mantherm from field equipment. 7-XII Off 10:27:30 am No record On 1:14 d.m. Temp 10.50 Second zinc gone betw 10:27+1:14 Put in new zinc + first mark is 1:32 p.m.- but third zinc corroded off at 3:34 p.m., leav- ing only one cell in commission + mag- et would not work on this. Fixed up an Edison CuO cell with NH₄Cl & con- nected it with the other. Worked all night, beginning 10:18 a.m., 8 Dec-