two o'clock
During the last hour the air had been strangely troubled . The symptoms could not be mistaken . A storm was threatening . The electric saturation of the atmosphere had become so great that about half-past two o'clock Robur witnessed a phenomenon that was new to him . In the north , whence the storm was traveling , were spirals of half-luminous vapor due to the difference in the electric charges of the various beds of cloud . The reflections of these bands came running along the waves in myriads of lights , growing in intensity as the sky darkened . The `` Albatross '' and the storm were sure to meet , for they were exactly in front of each other .