Experiments on the Length of the Cathode Dark Space with Varying Current Densities and Pressures in Different Gases

F. W. Aston
1907 Proceedings of the Royal Society A  
80 slow and the solutions were too dilute to allow of the detection of evolved gas with certainty: a small amount of a reddish solid, probably ferric oxide, was frequently observed, which was due to oxidation by traces of dissolved oxygen. The red solution in pyridine appears to be quite stable to lig h t; no change can be observed after long exposure.
doi:10.1098/rspa.1907.0016 fatcat:rkw65dzhjjesxgglxm6v74gnwy