1880.] On Heat Conduction in Highly Rarefied Air. 



241 



Pressure. 



620 M * 



117 M. 



59 M. 



23 M. 



12 M. 



5 M. 



Temperature 



25° 

 25 to 30 

 30 35 

 35 40 

 40 45 

 45 50 



25° 

 25 to 30 

 30 35 

 35 40 

 40 45 

 45 50 



25° 

 25 to 30 

 30 35 

 35 40 

 40 45 

 45 50 



25° 

 25 to 30 

 30 35 

 35 40 

 40 45 

 45 50 



25° 

 25 to 30 

 30 35 

 35 40 

 40 45 

 45 50 



25° 

 25 to 30 

 30 35 

 35 40 

 40 45 

 45 50 



Seconds occu- 

 pied in rising 

 each. 5°. 





 20 

 23 

 29 

 37 

 33 







23 

 23 

 32 

 44 

 61 







25 

 30 

 36 

 45 

 67 







28 

 33 

 41 

 55 

 70 





 30 

 37 

 41 



58 

 86 





 38 

 43 

 54 

 71 

 116 



Total number 

 of seconds 

 occupied. 

 



20 

 43 

 72 

 109 

 162 



- - 

 23 

 46 

 78 

 122 

 183 







25 

 55 

 91 

 136 

 203 





 28 

 61 

 102 

 157 

 227 





 30 

 67 

 108 

 166 

 252 





 38 

 81 

 135 

 206 

 322 



* M = millionth of an atmosphere. 



