50 
PRINCIPLES OF BACTERIOLOGY 
formalin are mixed, give the pail a good kick where¬ 
upon evolution of the formaldehyde gas will take place. 
Leave the room instantly and lock the door, leaving 
Fig. 8.—Instrument employed in applying Dakin’s solution to wounds. 
It consists of five glass distributing tubes for using single or large number 
of rubber conducting tubes, the flask is used for mixing the solution and 
the syringe with rubber bulb is used in testing the permeability of the 
conducting tubes. 
the room undisturbed for at least six hours, at the end 
of which period all windows should be opened. 
10. Dakin’s Solution.—Within the last two years a 
