46 



Mr. C. Chree. 



Table Y. 



Liquid. 



Water 



Methylated spirit. 

 Paraffin oil 



Turpentine oil ♦, . 



21 

 22 



27 



28 



25 

 25 

 26 



33 

 34 



U. 



+ 10- 3 x 13 

 + 10- 3 x 149 



-10" 3 x 57 

 -10" 3 x 8 



io- 3 



10~ 3 



+ 10--* x 30 



-io- 3 

 + io- 3 



12-36 

 197 



Mean 

 value of 

 X. 



20-9 



28 17 



25 -029 



33-86 



-0815 



0346 



-0273 



-0189 



Tempera- 

 ture. 



19*° 

 18 



20 



18 



As an example of the arithmetical results and the value of suc- 

 cessive lines of U, it will be as well to take as an example the results 

 in the case of methylated spirit, which are embodied in the following 

 table : — 



Table VI. 



Number of 

 line. 



X = 27. 



X = 28. 



1 



-10~ 6 x 99223 



-10- 6 x 84211 



2 



71974 



59235 



3 



30661 



24104 



4 



19382 



14098 



5 



16479 



8377 



6 



+ 10~ 6 x 3110 



+ 10~ 6 x 8043 



7 



17016 



20528 



8 



30864 



32878 



9 



39736 



39657 



10 



38564 



36556 



11 



28695 



25796 



12 



17346 



14560 



13 



4827 



3636 



14 



109 



67 



15 



10- 12 x 1 



10- 13 x 2 



Taking into consideration the nature of the investigation, the 

 agreement between the results obtained by the two methods seems on 

 the whole satisfactory. In the case of methylated spirit and paraffin 

 oil, the agreement could hardly be closer, and the fact that it is so 

 good must indeed in considerable measure be a pure matter of 



