140 



Mi; CHARLES DE WATTEVILLE ON FLAME SPECTRA. 



neck C of the globe A, whilst the outer tube of the sprayer is in communication with 

 a supply of compressed air. Part of the spray of the liquid falls to the bottom of the 

 globe A, whilst a much smaller portion is carried away by the stream of air and 

 passes into the upper glolx? E, where again the largest drops of the liquid fall down. 

 Communication is established between the globes E and A by means of a vertical 

 glass tube, in the wall of which there is a circular aperture O. The object of this 

 aperture is to afford a free passage to the mixture of air and the spray of the solution 

 in the event of a drop of the liquid, which deposits on the walls of the tube, collecting 

 at its lower end. One thus avoids all oscillatory movements of the flame due to the 



Extremity of the Sprayer 

 (Full Scale) 



Fig. 1. 



air forcing its way through the tube intermittently. The drops which do collect at 

 the end of the tube simply fall back into the globe A when they have become 

 .sufficiently heavy, and thus do not interfere with the passage of the air and spray 

 into the globe E. An indiarubber tube then conveys the mixture to one of the 

 branches of a Y-shaped tube, another branch of which is connected to the coal-gas 

 supply. The third branch is fitted at G into a wider tube GH, in which the heavier 

 liquid particles have a further opportunity of settling down. These collect in the 

 lower portion of the tube, whilst the gaseous mixture passes directly on wan Is 

 through H to the burner. The burner consists of a horizontal, cylindrical tube of 



