The London, Edinburgh and Dublin philosophical magazine and journal of science . ppears that the linear law connecting temperatureand pressure at constant volume holds accurately in this case.[Phil. Trans, vol. 178 A, pp. 57-93 ; and Phil. Mag. 435-458.] Profs. Ramsay and Young have given the values of a fora large number of volumes (Phil. Mag. vol. xxiii. p. 441), so that it was easy to calculate the values of —§ ? auc^ ^° P^ them against v~i. The resulting diagram is given on p. 104,and it suggests very strongly that there is a discontinuity ofslope at about vol. 33. In this re
The London, Edinburgh and Dublin philosophical magazine and journal of science . ppears that the linear law connecting temperatureand pressure at constant volume holds accurately in this case.[Phil. Trans, vol. 178 A, pp. 57-93 ; and Phil. Mag. 435-458.] Profs. Ramsay and Young have given the values of a fora large number of volumes (Phil. Mag. vol. xxiii. p. 441), so that it was easy to calculate the values of —§ ? auc^ ^° P^ them against v~i. The resulting diagram is given on p. 104,and it suggests very strongly that there is a discontinuity ofslope at about vol. 33. In this respect, accordingly, theether results show a striking likeness to those of isopentane,the discontinuity in the case of the last substance occurringat about the same volume. It was shown in my former paper that when Ramsay andYoungs linear law holds, there is one and only one tempera-ture for each yolume at which the pressure is given by .the 104 Mr. J. Bose-Innes on the Isothermals of Ether. laws of a perfect gas ; if we call this temperature t we easilyhave av T = bv-R ©. V—5= 1 2 3 -4 -5 -3 7 The values of b and a are given by Profs. Ramsay and Mr. J. Rose-Innes on the Isothermals of Ether. 105 Young {he. cit. p. 441) ; the values of t were thence obtained,and the results are given in the following table:— Volume. T. Volume. r. Volume. T. 300 17 16 792-2795-2795-5796-7798-0800-7801-6802-9805-5805 0805 6805-5807-2 4 815-3813-7796-7769-77355681-9662-66432621-5597-25712 250 3-7 200 15 3 3 150 14 3-0 100 13 12 2-75 2-5 75 50 11 2-4 40 10 9 2-3 30 22 25 20 8 21 7 20 19 .. 6 18. 5 III calculating this table, the value of R was taken = .qq^- An examination of the table shows that r remains nearlyconstant for all large volumes down to about vol. 3; itsnumerical value throughout this range is roughly 800. Theonly exception occurs in the case of vol. 300, but the valueof r is here so erratic that it is clearly subjec
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