Open AccessObservations and photographs of black and grey soap films
Author(s) -
Herbert Stansfield
Publication year - 1906
Publication title -
proceedings of the royal society of london. series a, containing papers of a mathematical and physical character
Language(s) - English
Resource type - Journals
eISSN - 2053-9150
pISSN - 0950-1207
DOI - 10.1098/rspa.1906.0028
Subject(s) - limiting , soap film , notice , art , materials science , physics , engineering , mechanics , mechanical engineering , political science , law
1. Some years ago, while working as a research student, in continuation of Reinold and Rücker’s work on soap films, I made measurements on a large number of black films. The conditions of the experiments were not suitable for observing the thinner black, and I did not notice it, although I knew that it had been recorded by Newton, and that Reinold and Rücker had not only seen the two blacks together, but had also obtained electrical observations indicating that the darker black was half the thickness of the other. Three years later, Johonnott published the results of optical measurements of black films, which showed that the thinner black was half the limiting thickness reached by the thicker black in the process of thinning.