522 Proceedings of the Royal Society of Edinburgh. [Sess. 
The consistency of the results was tested by calculating, with the aid 
of this formula, the temperatures corresponding to the observed pressures. 
The calculated temperatures, which, as thus derived, lie on a smooth curve, 
were then compared with those observed. In thirty cases the deviations 
range from 0*00° to 0’05°, in eight cases from 0'06° to 0T°, and in only five 
cases do they exceed 0T°. The greatest deviation (0*23°) is undoubtedly 
due to an accidental error in measurement. The average deviation of a 
single observation, including the erroneous one, is only 005°, and well 
within the proposed limit of accuracy. 
The temperatures are thermodynamic, with the boiling - point of 
sulphur assumed to be 445° exactly. If this point, as seems likely, should 
finally be found to be 444' 9°, adjustment can be made accordingly. 
The following table shows the smoothed values of Regnault (Reg.), 
Ramsay and Young (R & Y), Young (Y), Gebhardt (G), Cailletet, 
Colardeau, and Riviere (C C R), and of the authors (S & M). In the last 
case the values above 435° are extrapolated. Laby’s {Phil. Mag. [6], 16 
(1908), 789) recalculated values are also given. The boiling-point given 
by our formula is 356 , 95°±0T°, on the scale before mentioned. 
Comparative Table of Rounded Results. 
Temp. 
Reg. 
R& Y. 
Y. 
G. 
Laby. 
S&M. 
255 
85-0 
86-2 
84-45 
260 
96-7 
96-7 
96 5 
100-0 
97-8 
95-94 
270 
1230 
123-9 
124-0 
120-0 
124-8 
123-02 
280 
155-2 
157*4 
157-8 
158-8 
158-4 
156-29 
290 
194-5 
198-0 
198-9 
199-5 
199-3 
196-81 
300 
242-2 
246-8 
248-6 
249-0 
248-6 
245-85 
310 
299-7 
304-9 
308-0 
309-0 
307-7 
304-69 
320 
368-7 
373-7 
378-5 
378-1 
374-82 
330 
450-9 
454-4 
461-7 
461 3 
457-85 
340 
548-4 
548-6 
559 1 
559T 
555-54 
350 
663-2 
658-0 
672-5 
673 3 
669-77 
360 
797-7 
784-3 
803-7 
805-9 
802-62 
370 
954-7 
930-3 
954-7 
959-2 
956-25 
380 
1140 
1096 
1228 
OCR 
1135 
1133*0 
390 
1347 
1284 
1325 
1337 
1335-4 
400 
1588 
1496 
1549 
1596 
1566 
1566-1 
410 
l 1864 
1734 
1801 
1826 
1827-6 
420 
| 2178 
2000 
2085 
2119 
2123-4 
430 
2533 
2299 
2403 
2446 
2456-0 
435 
2459 
2572 
2628 
2637-5 
440 
2934 
2629 
2757 
2817 
2828-8 
445 
2808 
2939 
3018 
303V5 
450 
3384 
2996 
3150 
3230 
3229 
3245-0 
{Issued separately September 7, 1910.) 
