242 



Mr. W. Crookes. 



[Dec. 16, 



Seconds occu- Total number 



Pressure. Temperature. pied in rising of seconds 



each 5°. occupied. 



2M. .. 25° .. 



25 to 30 . . 41 . . 41 



30 35 .. 51 .. 92 



35 40 .. 65 157 



40 45 90 .. 247 



45 50 .. 165 .. 412 



