Very interesting paper on the phenomena of measuring temperatures as a function of electrical resistance of platinum that changes with temperature. Reminds one of some of Keely's laws of vibration. Originally published in 1898 and includes another article: "The Thermo-Electric Diagram from -200Â¡ C. to 100Â¡ C. Deduced from the Observations of Professors Dewar and Fleming." by the same author. These papers are important in the study of Keely's gold, silver and platinum wires.