EGGS IN COLD STORAGE. 63 



leading- from it to the storage room, wherever exposed 

 to the warm outside air. The size of apparatus 

 necessary for this purpose need not be large, as the 

 quantity of air necessary for ventilating egg rooms is 

 quite small, comparatively. 



"Americus" mentions a method of washing air 

 ventilation, in the July, 1898, number of Ice and Re- 

 frigeration, which seems to have advantages. The 

 idea is to draw or force air through a body of water 

 or brine by immersing the intake pipe so that the air 

 will bubble up through the liquid. This seems quite 

 simple, but when it comes to forcing air through a 

 liquid with a fan it is not so simple, as nothing short 

 of an air pump will drive air through a pipe submerged 

 as above described, unless the opening from pipe is 

 placed quite near the surface of the liquid; in which 

 case the benefit to the air is very small. Experiments 

 conducted by the writer along this line were consid- 

 ered failures. 



Shown in Fig. 10 is what appears as a rather com- 

 plicated apparatus, but on investigation it proves to 

 be quite simple. There are three members to this 

 system, as follows: First, The air washing tank, in 

 which the air flows upward against a rain of water 

 from a perforated diaphragm above, as clearly shown 

 in the sketch. This not only cools the air to the tem- 

 perature of the water, say 55 F. or 60 F., but it also 

 takes out a large portion of the impurities of various 

 kinds. From the washing tank the air is passed on, 

 in a comparatively pure and cool state to be still fur- 

 ther cooled. Second, The cooling tank, in which the 

 air is cooled to several degrees lower temperature 

 than that of the storage room. This removes the 

 moisture which holds in suspension the few impuri- 

 ties which may have passed the washing tank, the 

 moisture being deposited on the frozen surfaces 

 within the cooler. From the cooler the air is passed 

 into, third, the drying box, which contains chloride of 



