H59 



The last two columns show, that the observations aie verv well 

 represented by an equation of the form 



Ig /> =^ + B + C2' {]) in int. atm.) 



with A = —419.31, B = 5.2365, 6'=: -0.00648, kindly calculated 

 for me by Professor Verschaffklt. According to the equation the 

 normal boiling point of oxygen would be 



r=:90°.13K., /9 = — 1S2°.9Q C, 



whereas the observations in the immediate neighbourhood of the 

 boiling point themselves give: 



T= 90°.14 K., ^= — 182°.95 C. 



This boiling point was found to be T = 90°.ri K. ') by 



1) Gomm. NO. 107a gives T—To»c = — 182°.986C. In the computation, however, the 

 pressurecoefBcient of hydrogen at 1100 mm. freezing point pressure is taken at 

 0.0036627, wliereas, if we put Tooc = 273°.09 K. and adopt the corrections to 

 the absolute scale given by Kamerlingh Onnes and Braak, the correct value is 

 0.0036628, which leads to —182.98 and 7' = 90°.11 K. 



43* 



