64 this large amount of oil required to run thru a charge is due to the decreasing efficiency of the batteries with decrease in temperature. The cells are supposed to have passed the lower limit of operat- ing temperature when they get below 45° F, but our cells are working right along at temperatures ranging from 60° F to 20° F, most of the time below freezing. The 30s gallons of cooling water in the big tank gets very hot in a long run of the engine and raises the temperature of the engine room and workshop sufficiently to melt the frost on the ceilings and the water runs down the walls and drips from the ceiling in dozens of places - but re-forming ice as soon as it strikes the floor. A long run always results in a severe headache for me, because the air in the room is so full of the fumes from the engine. Sun Dec 7-13. I had the 4 AM watch this morning and have the watch again till 1 AM tonight. Mac, Tank, and I are splitting the watches now while the other three boys are gone. I wrote a letter in the morning, and went for