Haughton and Eeynolds — "Brag" of Air upon Air. 281 

 5. litk June, 1879 :— 



Hour. 



« 







h. m. 







000 



oo°-o 



100°-00 



100 



39 -8 



74-25 



2-30 



99 -3 



47 -25 



3-30 



139 -0 



35-50 



4-30 



179 -0 



26 -00 



Prom these data I find — 



One hour, /= 1 ^ 6062 



Two and a-half hours,. ..... „ 6007 



Three „ „ „ 6087 



Four „ „ „ 6027 



Mean of all, /= . 



■^ 6046 



6. 16th June, 1879:— 



Hour. 



M 



e 



h. m. 







0-00 



oo°-o 



100°-00 



1-00 



39 -8 



73-75 



2-00 



79 -5 



55 -00 



3 00 



119 -2 



39 -00 



4-00 



159 -0 



29 -00 



4-30 



179 -0 



25 -00 



From these data I find — 



One hour, /= 1 ^ 5928 



Two hours, ,, 6031 



Three „ „ 5741 



Four „ ,, 5826 



Four and a-half hours, „ 5856 



Mean of all /= . 



•^ 5876 



I have no doubt, from the close agreement of the results of each 

 day's experiments, that the differences observed from day to day are 

 real, and depend upon the varying temperature and pressure of the 

 atmosphere : but, as my present object is only to find a general mean 



