The London, Edinburgh and Dublin philosophical magazine and journal of science . is formed in a charged gas the electrification resides onthe drops forming the cloud. So that we have definite proofof the fact that the drops are formed round the carriers ofthe electric charge. 2. These results were used to find the charge on eachcarrier, and it was found to coincide with what we can * Communicated by Prof. J. J. Thomson, Mag. S. 5. Vol. 45. No. 273. Feb. 1898. L 12 Mr. John S. Townsend on Electrical calculate as being the atomic charge, on the supposition thatat ordinary temperature
The London, Edinburgh and Dublin philosophical magazine and journal of science . is formed in a charged gas the electrification resides onthe drops forming the cloud. So that we have definite proofof the fact that the drops are formed round the carriers ofthe electric charge. 2. These results were used to find the charge on eachcarrier, and it was found to coincide with what we can * Communicated by Prof. J. J. Thomson, Mag. S. 5. Vol. 45. No. 273. Feb. 1898. L 12 Mr. John S. Townsend on Electrical calculate as being the atomic charge, on the supposition thatat ordinary temperature and pressure there are 1020 mole-cules in each cubic centimetre of a gas. The experimentsgiving the weight of the cloud corresponding to the chargebeing of importance were repeated by the following method,which gave the same proportionalities, in the different gases,between the charge per and weight of cloud per aswere previously obtained. 3. The apparatus which was used is shown in fig. 1. Thepositively-charged oxygen and hydrogen given off from a Fig. dilute sulphuric-acid cell were first bubbled through a solutionof potassium iodide in the small flask A, and then throughdistilled water in B. Both A and B were immersed in atrough of water C, so that they should remain at a fixedtemperature while an experiment was being conducted. Thecharged gas thus formed a cloud and carried it along thedelivery-tube D, which led into the paraffin block P inside alarge metallic screen S. The block P was arranged as shownin the figure, in order that the moisture should not breakdown the insulation by settling on the paraffin. By thismeans the moist gas entered the larger tube T connected tothree sulphuric-acid bulbs, F, set up between the two paraffintunnels P and Q. After the gas had bubbled through theacid it was not only cleared of the moisture which underordinary conditions it would have carried from B, but thecloud was also completely removed. The increase of weight Proper
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectscience, bookyear1840
