82 Prof. Chattock, Miss Walker, and Mr. Dixon on the 



and a second tube of glass-wool was inserted between the kipp 

 and the drying-tubes. 



Air, 



c. 



n. 



v+. 



V-. 



V. V-/V+. 



z v 



e v 





30 



26 



1-38 



1-80 



1-59 



131 



5-2 



3-6 



Tube A. 



2-0 



3 



T46 



1-84 



1-65 



1-26 



34 



0-4 



Tube B.I. 



32 



15 



1-33 



1-84 



1-58 



1-38 



6-2 



3-2 



Tube B. II. 



1-6 



15 



1-31 



1-81 



1-56 



138 



,, 



„ 



„ „ 



0-8 



15 



1-31 



174 



1-52 



1-33 



,, 



,, 



,, „ 



1-9 



21 



1-41 



1-85 



1-63 



1-30 



„ 



»? 



Tube B. III. 



11) 



15 



1-41 



1-72 



1-56 



1-21 



,. 



" 



Tube B. IV. 



1-9 





1-32 



1-80 



1-55 



1-36.... 



.... Me 



ans of Tube B. II. 







The experiments with Tube A are in this case the ones 

 already published. In II. the air was drawn through glass- 

 wool, caustic potash, sulphuric acid, phosphorus pentoxide, 

 and glass-wool, in that order. In III. some of the air was 

 afterwards found to have been drawn in past a badly-fitting 

 cork, so that it did not all pass through the drving-tubes ; 

 the effect of which is probably to be seen in the lower value 

 of V-/Y + . In IV. the air was wet, its treatment being 

 otherwise the same as in II. 



The air was not passing through the discharge-tube during 

 the readings, but fresh air was pumped through after every 

 two determinations of V. 



Oxygen. 



c. 



n. 



v+. 



V-. 



V. 



Y-/T4-. 



z x . z 2 . 





1-9 



15 



1-42 



1-84 



1-63 



1-30 



6-2 3-2 



Tube B. II. 



3-2 



14 



1-33 



1-90 



1-61 



T43 



» n 



Tube B. III. 



T6 



14 



1-33 



T86 



1-59 



1-40 



ii » 



ii ii 



0-8 



34 



1-25 



1-78 



1-51 



1-42 



„ 



a 'i 



w 





1-30 



1-85 



1-57 



1-42... 



Means of Tube B. III. 



Tiie gas came from an ordinary oxygen cylinder over 

 phosphorus pentoxide and through glass-wool. The platinum 

 ring was alone used. The gas passed frequently through 

 the discharge-tube between the experiments, as in the case of 

 air, but was not flowing while the readings were b^ing taken. 

 Experiments II. were made directly after a long series on 

 hydrogen, and have been omitted from the mean on account 



