The temperature had also dropped to minus 20 deg..

Bartlett was just starting out again when I arrived, and we agreed that we had made a good fifteen miles in the last march.
The next day, March 27, was a brilliant dazzling day of arctic sunshine, the sky a glittering blue, and the ice a glittering white, which, but for the smoked goggles worn by every member of the party, would certainly have given some of us an attack of snow blindness.

From the time when the reappearing sun of the arctic spring got well above the horizon, these goggles had been worn continuously.
The temperature during this march dropped from minus 30 deg.

to minus 40 deg., there was a biting northeasterly breeze, and the dogs traveled forward in their own white cloud of steam.

On the polar ice we gladly hail the extreme cold, as higher temperatures and light snow always mean open water, danger, and delay.