Organic Bodies containing Metals* 243 



II. Estimation of Oxygen in residual gas. 



Difference Correctedvol. 



Observed of mercury atO°C.andl 



volume. Temp. level. Barom. metre press. 



^tmrstf^''!"^}"7-5 19-3 C. 53-1 740-6 75-44 



^1rorofo7dry7'}l01"3 17-0 69-3 743-8 64-16 



III. Combustion of Gas remaining after absorption of Oxygen. 



Difference Correctedvol. 



Observed of mercury at 0° C . and I 



volume. Temp. level. Barom. metre press. 



Volume of gas used-ljgg.g 1^30.558-/ 743-3 34-91 



(moist) . . ' 

 Volume after admis- , 3^^.^ ^^.^ 3^^.^ ^^^.q ^^,r^^ 



■\- 



sion of (moist) 



Volume after explo-U^o.^ 17-6 433-3 744-3 75-13 



sion (moist) . j 

 Volumeafterabsorp-l 3 ^^.g ^^g.^ j,^^.^ gg.^^g 



tion of CO^ (dry) J 

 Volume after admis-lggjj.g ^^.g ^gg.^ ^^g.j gyg.gg 



Sion 01 H (dry) J 

 Volume after explo-lg^g.g ^g.^ ggg.g y^g.^ ^34.30 



sion (moist) . J 



The gas remaining after diffusion and subsequent absorption 

 of oxygen therefore contained in 24*91 vols. 15-63 vols, nitrogen 

 and 9 '28 vols, combustible gas, which last was a single gas and 

 not a mixture, since it consumed the same amount of oxygen 

 and generated the same amount of carbonic acid after as before 

 diffusion : — 



me of Oxvffen 



CO^ generated. 



9-00 

 : -97 



Experiments Nos. I., II. and III., taken together, enable us 

 to ascertain the volume of the gas which escaped and that of the 

 air which entered during the diffusion experiment ; these volumes 

 are as follow : — 



Volume of gas escaped . . . 86*95 

 Volume of air entered . . . 63'97 



Hence, according to the well-known law of diffusion, the 

 specific gravity of the gas must be •5413. 



