FIG. 1. Distillation Apparatus for the Nitrogen Determination 



The apparatus shown in Fig. 1 has been found very convenient in student labora- 

 tories. C is a liter flask to be used as a steam generator. Its rubber stopper carries 

 the glass tube B, which acts as a safety valve ; a second glass tube, on the end of 

 which is a piece of rubber tubing and the pinchcock A ; and a third glass tube, con- 

 necting, by means of the rubber tubing D, with the glass tube F. The latter goes 

 nearly to the bottom of the Kjeldahl flask G, which is connected with the block- 

 tin tube of the condenser / through the Hopkins safety distillation bulb H. K is a 

 receiving flask containing the standard acid. By means of a Y-tube in place of the 

 third glass tube in the stopper of C, two Kjeldahl flasks for duplicate determinations 



may be connected with the latter 



