286 E. W. Morley — Yolmnetric Composition of Water. 



The experiments made divide themselves into groups accord- 

 ing to the purity of the gases used. In some, both gases con- 

 tained nitrogen, in some, only the hydrogen, in some only the 

 oxygen, and in some, both gases were pure ; in some carbon 

 dioxide was produced, although both gases were pure. I give 

 in full the quantities measured or the quantities computed from 

 them, in the case of the first experiment of each of these 

 groups ; but I selected the eighteenth experiment, rather than 

 the seventeenth, so as to include one in which there was an 

 excess of oxygen. 













' 6 



■z 



© 



1 



o 



© 



■6 



2 



„ 



mb- 



•ogen 1 

















a 



OS 



3 





\ 



B 





'A 



O 



o 



© 

 5 

 3 



02 



a 

 o 



©■? 



©x 



.no 



^ p 



© 



•6 



© 



02 





.• 



6 



a 



© 







© 



•" 



g 



£ 



*c 



o 



— '-M 



g£ 



© 



S 





03 





u 



Zl 







be 





© 











S'd 



to 



a 





— 





z. 



p 



© 

 b£ 



~ 





it 



sc 



O 



5 



bo 



2© 



o 5 



3-w 



p 



© 

 tag 



6 









■3 



>, 





•5 











>> 



i3 « 



S o 



-5 



>> 







© 









© 





* 









* 



■< s 



<<g 



>> 



M 



rt 



z 



P-i 



^ 



a 



C 



- 



a 



° 



z z 



5 



O 



* 





^ 



Q 



» 





cm 



o 



cc 



cc 



cc 



cc 



cc 



cc 







cc 



cc 









1 64 



22 



307-89 



150-03 



829 



8-015 



... 



11 



•165 



... 



-- 



8-12 



•165 



299-77 



149-865 



2-00027 



2 



64 



22 



307-29 



149-28 



8-68 



8-57 



... -11 



•oo 



... 



-- 



8-68 



•oo 



298-61 



149-28 



2-00033 



4 66 



20 



325-36 



156-21 



13-36 



13-21 



... 



•oo 



•15 



... 



-- 



13-21 



•15 



312-15 



156-06 



2-00019 



14 72 



23 



383-30 



185-70 



11-87 



11-87 



... 



•oo 



•oo 



... 



-- 



11-87 



•00 



371-43 



185-70 



2-00016 



18 



75 



25 



407-93 



205-71 



1-73 



.... 



1-66 .. 



--- 



•065 



•09 



•00 



1-75 



407-98 



203-96 



200029 



In the following table I give the approximate temperature 

 and pressure at which the hydrogen and oxygen were mea- 

 sured in each experiment, the amounts of impurities found in 

 each gas, and the amounts of hydrogen and oxygen consumed 

 in the explosion, with the ratio thence deduced. The pairs of 

 determinations which are bracketed together were made one 

 immediately after the other of the pair, with the same stores 

 of gas extracted at the same time, and as nearly as possible 

 under the same conditions, except that different gases were in 

 excess. This will explain why the amounts of impurities 

 found in the oxygen used should show such agreement. The 

 oxygen used in the experiments from the fourth to the twelfth 

 was obviously undergoing slow admixture with air; which was 

 suffered to continue, in order to see if the presence of nitro- 

 gen affected the ratio found. After a while, the crack in a 

 glass tube which had shown itself was closed by fusion. 



