On the two modes of condensation of water vapour on glass surfaces, and their analogy with James Thomson’s curve of transition from gas to liquid

Experiments were made, using glass wool as the substance on which the condensation of water vapour was observed, in continuation of work published last year in the ‘Proceedings of the Royal Society’* on the condensation of water vapour by wool and cotton. The apparatus used is similar to that previously employed except for an alteration to enable the material under examination to be raised in temperature for the purpose of drying.