470 
Proceedings of the Royal Society of Edinburgh. [Sess. 
Pressure 
in kgs. /cm. 
2 = 
400. 
700. 
1000. 
1300. 
V T -V 0 
<1 
1 
<1 
O 
V T . 
T. 
V T -V 0 
Vt- 
T. 
y T -y 0 
V T . 
T. 
V T . 
T. 
1 0 
y 0 .t 
V„.T' 
y 0 .t- 
t 0 .t • 
135 
245 
•00143 
137 
266 
•00139 
139 
295 
•00132 
146 
305 
•00151 
140 
244 
164 
141 
275 
149 
144 
305 
144 
151 
324 
158 
159 
286 
206 
161 
325 
188 
163 
358 
176 
165 
382 
170 
175 
303 
247 
177 
344 
224 
180 
388 
206 
193 
438 
212 
186 
325 
264 
188 
365 
241 
189 
410 
217 
194 
441 
213 
186 
331 
260 
188 
369 
238 
190 
411 
219 
203 
476 
216 
196 
312 
308 
198 
362 
271 
*191 
407 
224 
256 
546 
286 
203 
321 
321 
205 
380 
276 
200 
425 
235 
257 
568 
276 
208 
330 
327 
210 
387 
284 
209 
431 
253 
299 
587 
339 
209 
333 
328 
210 
392 
281 
214 
433 
264 
228 
351 
365 
231 
395 
332 
235 
445 
304 
232 
345 
383 
235 
410 
329 
252 
475 
320 
246 
357 
409 
248 
394 
376 
253 
466 
328 
246 
337 
433 
249 
419 
356 
253 
487 
314 
246 
344 
425 
255 
415 
373 
258 
489 
323 
259 
352 
452 
262 
430 
377 
263 
476 
342 
286 
361 
516 
291 
435 
439 
265 
497 
332 
*509 
383 
•01068 
*514 
550 
753 
294 
503 
386 
*509 
407 
1005 
*514 
547 
757 
327 
571 
397 
527 
395 
1081 
583 
607 
796 
369 
573 
469 
575 
423 
1123 
635 
597 
896 
*394 
610 
584 
*678 
441 
1311 
*690 
642 
919 
*519 
703 
596 
784 
472 
1449 
758 
690 
954 
*519 
723 
580 
794 
/ 715 
971 
562 
798 
579 
\ 731 
949 
572 
794 
594 
591 
765 
642 
611 
889 
575 
643 
757 
717 
735 
1002 
634 
745 
960 
672 
750 
936 
694 
769 
888 
754 
812- 
924 
771 
* See p. 457. 
The values of V T and T given in the preceding Table were plotted on 
square paper, and smooth curves were drawn as shown in fig. 4. Amagat’s 
values for the volume of water at high pressures give us the volumes for 
200° C. The scale of the diagram is too small to allow the curves to be 
accurately drawn in below that temperature. It is seen that, with the 
exception of a few points above 700° on the 1000 isopiestic, all the points 
lie fairly well on the curves drawn. Over 80 per cent., in fact, of the points 
lie on the curves within an error limit of 2 units in V and of 12 units in T. 
The real possible error in the case of T is difficult to determine, but we 
should expect it to be greater than 10° at least, because the temperature 
could be observed at only one point, introducing a considerable error in 
spite of the correction, and, besides, the smallest division on the registering 
