Pressures of Saturation of Oxygen. 



457 



pouring against the sides in a strong jet and consequently 

 evaporating too rapidly, a short thin-walled glass tube z sur- 

 rounding the copper tube served to collect and to direct down- 

 wards all the four streams of oxygen. In the third opening 





was placed a T-shaped glass tube connected at one end p with 

 a large Burckhardt air-pump, worked by means of a gas- 



