GO 



DENSITIES OK OXYGEN AND HYDROGEN 



Inly 

 luly 

 July 



July 

 July 

 July 

 luly 



15-16 

 17-18 

 '9 



12-13 



«4->5 

 16-17 

 18-19 



OBSERVATIONS WITH GLOBE 3. 



7 observations 



Kxhausted 



Filled 



Filled 



OBSERVATIONS WITH GLOBE 5. 



observations 



Exhausted 

 Filled 

 F>xhausted 

 Filled 



-V 94jO 

 28.2648 

 2S.2494 



3°-7055 

 28.8641 



30.7042 



28.9660 



Combining the observations in the way which was thought propel- at the time 

 of the experiments, Ave get the following determinations of the weight of the hydro- 

 gen in the globes. Tlie table gives the pressures reduced to , the readings of the 

 thermometers reduced to the scale of 2053, the computed reading of the hydrogen 

 air thermometer, the gross weight and the tare of the globes, their capacities at the 

 temperature of the experiment, and the density computed ; the latter includes the 

 correction for nitrogen given on page 59, and is i-omputed for the sea level in 



W 760 L G45 



If we increase the mean l)y one thirty-thousandtli,* we get 



1) = (>.(tS!)9;58 gr. ± 0.000007. 



6. JlVDUOCiKN, .SKCONU .MKTllUD. 



In a .second series of experiments, tilt' niaiii]iulatit)n was pi'ci-iscly like tliat in 

 the third series of experiments on the density of oxygen, except in tiic pre[>aration 

 of the hvdrogen. No examination of the hydrogen for impurities was iiiath-, since 



*Sef iiKle, i)age 28. 



