Trouillet and Girardot obtained a series of observations with maxima and minima thermometers at Chaux-les-Passavant during the winter of 1885-1886. At the end of November the temperature inside was +2°. On the 2d of December it rose to +2.5°. On the 10th of December, it sank to -1°, and after this date, it remained below freezing point all winter. The observations were not continuous, but they showed that every time the temperature outside dropped considerably, the temperature inside immediately did likewise. For instance, on the 12th of January, the outside air dropped to -18°, and the inside air responded by falling to -15°. On the other hand, when the temperature outside rose above freezing point, the temperature inside remained stationary or fluctuated only gently. For instance, from the 24th of March to the 8th of April, the outside air went up and down perpetually, the extremes being -2° and +16°; while in the same time the inside air rose continuously from -2° to -0.5°. Windholes and Ice Formations near Gérardmer, Vosges. (Rozet, in _Encyclopédie Moderne_, Didot Frères, Paris, 1853, vol. XVI., page 503.) L'Abime du Creux-Percé or Glacière de Pasques. (Martel, _Les Abimes_, 1894, page 394; _Annuaire du Club Alpin Français_, vol. XIX., page 38.)--On the plateau of Langres, Côte d'Or. It lies 15 kilometers from Dijon, and is really a limestone rock gorge, of 55 meters in depth, which at the top is 40 meters long and 20 meters wide, and at the bottom is 15 meters long and 12 meters wide. In March 1892, Mons. Martel found the north side covered with large icicles 15 meters long. The ice seems to remain throughout the year. The bottom of the Abime has been reached only by means of two long rope ladders. Creux de Chevroche or Roche Chèvre, Côte d'Or. (Clément Drioton, _Mémoires de la Société de Spéléologie_, 1897, vol. I., page 209.)--"In the woods of Mavilly, near Bligny-sur-Ouches, is a little cave, called Creux de Chevroche or Roche-Chèvre, where one can find ice until the month of July." Freezing Well of Marolles, at La Ferté-Milon, Aisne. (Martel, _Les Abimes_, page 563, note 2.)--This well is 8.15 meters deep; the altitude is 70 meters. During the winter of 1892-93 the water in it froze for a thickness of 15 centimeters. The minimum outside temperature that year was -17°. Windholes near Pontgibaud, Puy de Dome. (G. Poulett-Scrope, _The Geology and Extinct Volcanoes of Central France_, 1858, page 60.)--These windholes are in basalt. There are many cracks, whence cold air currents issue, and where ice has been found, sometimes in summer. There are cold storage huts over some of the cracks.