9th January, 1858 7.36 P. M., -4.5° 7.16 P. M., -0.6° " " " 7.20 " -1.2° " " " 7.27 " -2.5° " " " 7.50 " -2.9° Minimum of night -5.8° -4.9° 10th January, 1858 10.53 A. M., -3.4° 10.12 A. M., -4.6° " " " 11.14 " -3.1° 10.30 " -4.5° " " " 11.45 " -2.2° 11.20 " -4.4° " " " 12.32 P. M., -2.4° 12.14 P. M., -4.4° " " " 1.12 " -0.9° 1.30 " -4.2° " " " 3.03 " -2.9° 2.30 " -4.1° " " " 3.56 " -3.5° 3.14 " -4.0° " " " 4.26 " -3.7° 4.00 " -3.8° Minimum of night -7.6° -6.8° 11th January, 1858 9.34 A. M., -5.6° 2d April, 1858 6.20 P. M., +0.7° -0.2° Minimum of night + 1.1° 3d April, 1858 10.00 A. M., +4.0° 9.00 A. M., -1.0° Professor Thury's winter excursions caused him to accept as proved that part of the mountaineers' belief, which holds that there is no ice formed in caves in winter. One of the main grounds for his opinion was the series of observations he made in the Glacière de Saint-Georges. He found no ice forming there in winter and the natives said it did not because the cavern was not cold enough. So he placed large dishes filled with water in the cave and found that they froze solid during the night, which he had been assured was impossible. Thury also found violent movements of the air at Saint-Georges in January, 1858. A candle burned steadily for some time, but at 7.16 P. M. it began to flicker and soon inclined downwards through an angle of about 45°; and in the entrance, the flame assumed an almost horizontal position. At 8 P. M., the current of air nearly disappeared. Thury thought that this violent and temporary disturbance of equilibrium was due to the fact that as the heavier air outside tended to pass into the cave, the less cold air within tended to pass out; and the narrow entrance confining the struggle to a small area, the weaker current was able for a while to hold its own. The Glacière du Pré de Saint-Livres. Described in Part I., page 65. (Browne, _Ice Caves_, page 40.)--Mr. Browne found, in 1864, a temperature of 0°.