Of nitrogen on nickel

However, there is another consideration which has worried this author as early as 1937 when he and his coworkers measured the adsorption isotherm of nitrogen on nickel and iron at liquid oxygen temperature and found that the isotherm was essentially flat between 10-4 and 10 l mm. Hg pressure. It was about this time that the Emmet-Brunauer method was first made public, and off hand the two results appeared to be irreconcilable. This uncertainty was aggravated by the fact that the nitrogen adsorption isotherm as published by the author and his Coworkers could at that time not be extended to pressures higher than... 

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