on this subject, Tucker took the wooden box in which we had brought the hypsometer, laid it on the snow, leveled it up carefully with the Stanley pocket level, and took a squint over it toward the north peak. He smiled and said nothing. So each of us in turn lay down in the snow and took a squint. It was all right. We were at least 250 feet higher than that aggravating peak.

Page 45We were also 450 feet higher than the east peak of Coropuna, and a thousand feet higher than any other mountain in sight. At any rate, we should not have to call upon our fast-ebbing strength for any more hard climbs in the immediate future. After arriving at this satisfactory conclusion we pitched the little Mummery tent, set up the tripod for the mercurial barometer, arranged the boiling point thermometer with its apparatus, and with the aid of kodaks and notebooks proceeded to take as many observations as possible in the next four hours. At two o'clock we read the mercurial, knowing that at the same hour readings were being made by Watkins at the Base Camp and by the Harvard astronomers in the Observatory at Arequipa. The barometer was suspended from a tripod set up in the shade of the tent. The mercury, which at sea level often stands at 31 inches, now stood at 13.838 inches. The temperature of the thermometer on the barometer was exactly +32° F. At the same time, inside the tent we got the water to boiling and took a reading with the hypsometer. Water boils at sea level at a temperature of 212° F. Here it boiled at 174° F. After taking the reading we greedily drank the water which had been heated for the hypsometer. We were thirsty enough to have drunk five times as much. We were not hungry, and made no use of our provisions except a few raisins, some sugar, and chocolate.

After completing our observations, we fastened the little tent as securely as possible, banking