392 Prof. Adeney and Mr. Becker: Determination of Rate of 



temperature, giving a straight line with the formula 

 6 = -0075(T-240*l): This will be referred to when finally 

 considering the results. 



Table VI. 



Results of Experiments with Atmospheric Air. 



Tempera- 

 ture, 



°0. 



Values from 

 log graph. 



Values from 

 graph. 



w 



Saturation Values. 



Mean 



Value of 



b. 



t. 

 71 



b. 



•266 



a. 

 •750 



w . 



2-720 



b. 

 •296 



Dittmar. 

 2-534 



Sum of 



Readings. 



2-682 



3-6 



•281 



11-4 



— 



— 



•645 



2 060 



— 



— 



2-074 



— 



11-3 



54 



•336 



•675 



2-115 



•312 



2-126 



2131 



•324 



150 



— 



— 



•695 



1-730 



— 



— . 



1-806 



— 



15-0 



47 



•307 



•650 



1-640 



•338 



1-988 



1-614 



•367 



200 



— 



— 



•700 



1-640 



— 



— 



1-663 



— 



20-0 



44 



•431 



•640 



1-500 



•368 



1-818 



1-484 



•399 



250 



— 



— 



•720 



1-570 



— 



— 



1-573 



— 



25-0 



40 



•459 



•650 



1-380 



•411 



1672 



1-381 



•435 



29-6 



— 



— 



•640 



1-265 



— 



1-555 



1-267 



— 



293 



36 



•523 



'660 



1-320 



•421 



1-564 



1-300 



•472 



34-2 



— 



— 



•585 



1-060 



— 



1-457 



1-017 



— 



344 



32 



•580 



•595 



1-010 



•406 



1-453 



0-934 



•493 



38-5 



— 



— 



•630 



0865 



— 



— 



0-845 



— 



38-6 



28 



•665 



•585 



0-785 



•446 



1-360 



0-787 



•555 



V. Impkovements in Methods of Experimenting. 



When the form of apparatus, described in Part I. of this 

 communication, was employed in experiments at tempera- 

 tures much above or below room-temperature, a number of 

 possible sources of error might be expected to affect the 

 results, viz. : — 



1. Difference of temperature between the water-jacket 

 and the air drawn in to renew bubble. 



2. Absorption of air during periods of manipulation. 



3. Difference in temperature between the air in the 

 bubble and that in the air-space of the manometer. 



