74 



Mr. E. H. Griffiths on the Influence of 



Table V. 



Experiments. 



I. 



II. 



III. 



IV. 



V. 



VI. 



6>N- 



-7^Xl0 G . 



at 



CV 



*x E ' x 2 °ViO'. 



at e 2. 



T. 



T 

 J* 



1 to 5 ... 



17-784 



2748 



•09040 



10265 



974-2 



232-05 



6 to 8 ... 



9 „ 12 ... 

 13 „ 15 ... 

 16 „ 18 ... 

 19 „ 21 ... 

 22 „ 24 ... 



25-933 

 16562 

 25-471 

 33-158 



40-548 

 50-398 



2392 

 2417 

 2395 

 2370 

 2345 

 2314 



•09062 

 •09037 

 •09061 

 •09081 

 •09102 

 •09129 



8952 

 9020 

 8964 

 8890 

 8816 

 8722 



1117-0 

 1108-6 

 1115-6 

 1124-9 

 1134-3 

 1146-5 



266-08 

 264-10 

 265-77 

 267 97 

 270-22 

 273-12 



25 to 27 ... 

 28 „ 30 ... 

 31 „ 33 ... 

 34 „ 36 ... 

 37 „ 39 ... 

 40 „ 42 ... 



16-705 

 25-454 

 33-230 

 40-545 

 50 524 

 16-780 



1711 

 1696 

 1680 

 1664 

 1640 

 1712 



•09037 

 •0906] 

 •09082 

 09102 

 •09129 

 •09037 



6387 

 6348 

 6300 

 6251 

 6185 

 6390 



1565-7 

 1575-3 

 1587-1 

 1599-8 

 1616-8 

 1564-9 



372-99 

 375-30 

 278-10 

 38111 

 38514 

 372-h0 



Remarks on Tables IV. and V. 



Experiments 1 to 3 (3 cells) and 4 to 5 (2 cells) were per- 

 formed with a view to testing the working of the various 

 portions of the apparatus, and in order to ascertain the 

 minimum quantity of liquid that could be used with, safety. 



dO 

 The results were not satisfactory : the values of — ~ at the 



same temperature, when deduced from the different experi- 

 ments in which the conditions were similar, differed con- 

 siderably, occasionally by as much as 1 per cent. The cause 

 was evident : the depth of liquid was too small to give satis- 

 factory results with this form of stirrer. Considerable 

 difficulty was experienced in maintaining the potential balance, 

 and it is possible that at times portions of the coils were 

 uncovered. I therefore decided on increasing the depth ol 

 the liqnid. 



Experiments 6 to 8. — The mass of aniline was now increased 

 by about 60 grms., and the observations became more satis- 

 factory. These experiments were performed with a stirring 

 rate of 9'10 per second. I had not yet decided upon the best 

 method of ascertaining the null point, and unfortunately did not 

 perform any 4-cell experiments. When deducing the results, 

 I assumed that the intersection of the 2- and 3-cell lines stood 



