E. W. Morley — Volumetric Composition of Water. 287 



as 



3 



05 



2 

 ti 



u 

 <o 

 a 

 3 

 H 



o 



22 

 22 

 19 

 20 

 20 

 20 

 20 

 20 

 20 

 22 

 22 

 22 

 23 

 23 

 23 

 26 

 26 

 25 

 25 

 24 



3 



02 

 CO 



cm 



64 

 64 



66 

 66 

 66 

 70 

 70 

 72 

 72 

 72 

 72 

 73 

 71 

 72 

 72 

 73 

 73 

 75 

 75 

 75 





a . 

 .^ a 



a as 



05 60 



ito 



.2 

 Sa 



O 05 

 60 60 

 o S>> 



cc 



•165 

 •00 

 •00 

 •15 



■15 

 •18 

 •18 

 •31 

 •31 

 •72 

 •82 

 •82 



05 



ce» 

 o 



6l3 



>>a 

 a 



ad 



45 35 



2§ 

 ■e'S 



K o 



299-77 

 298-61 

 316-45 

 312-15 

 32536 

 33962 

 347-24 

 364-58 

 386-65 

 381-85 

 389-79 

 395-75 

 372-09 

 371-43 

 38330 

 383-51 

 F92-58 

 39974 

 407-98 

 399-21 



Oxygen 

 consumed. 



.2 



el 



co 

 a> 



05 



►4 



05 

 C 

 CO 



a 



& 



1 





cc 



11 

 •11 



12 

 00 

 00 

 00 

 00 

 00 

 00 

 00 

 00 

 00 

 00 

 00 

 00 

 00 

 00 

 00 

 00 

 00 



149-865 



149-28 



158-205 



156-06 



162-67 



169-77 



173-60 



18228 



193-31 



190-92 



194-87 



197-85 



18601 



185-70 



191-62 



191-74 



196-27 



19985 



20396 



19959 



2-00027 

 2-00033 

 2-00025 

 2-00019 

 2-00012 

 2 00047 

 2-00024 

 2-00011 

 200016 

 2-00005 

 2-00026 

 2-00027 

 2-00038 

 2-00016 

 2-00031 

 2-00016 

 2-00021 

 2-00020 

 2-00029 

 2-00015 



hydrogen, 

 hydrogen, 

 hydrogen, 

 hydrogen ) 

 oxygen. J" 

 hydrogen ) 

 oxygen, j" 

 hydrogen \ 

 oxygen, j" 

 hydrogen, 

 oxygen. } 

 hydrogen ) 

 hydrogen, 

 hydrogen ) 

 oxygen. \ 

 hydrogen ) 

 oxygen, j" 

 hydrogen ) 

 oxygen. \ 

 hydrogen. 



9 







3 







4 







5 







6 







7 







8 







9 







10 







11 







12 







13 







14 

 15 



•00 



•oo 



00 

 •00 

 •00 

 •00 

 •00 







16 







17 



18 

 19 

 20 



■065 

 •065 



•09 

 •09 



Comparison of Results. 



Experiment 1 is alone in showing impurity in both gases ; 

 its result gives 2 '00027 for the value sought. 



Experiments 2 and 3 showed nitrogen in the hydrogen ; 

 their mean is 2*00029. 



Experiments from 4 to 12 showed nitrogen in the oxygen ; 

 their mean is 2'00021. 



Experiments 13 to 17 and experiment 20 showed no measur- 

 able impurity in either gas ; their mean is 2*00023. 



In experiments 18 and 19, carbon dioxide was produced; 

 their mean is 2 00025. 



The mean of the seven experiments where oxygen is in 

 excess, is 2*00023, and that of the thirteen in which hydrogen 

 was in excess is also 2'00023. Weights were originally assigned 

 to each result according to the circumstances of each experi- 

 ment, but they did not change the final mean, and are not 

 given. Four experiments were lost by accident, all others are 

 given. The mean error of a single determination of the ratio 

 is -000075, or one part in 26000. The final mean value of the 

 ratio is 2*0002. 



Summary. 



Pure hydrogen cannot be obtained from the purest commer- 

 cial zinc. By the electrolysis of dilute sulphuric acid, with a 

 proper purifying train, I have obtained hydrogen containing 



