136 AoKIOULTUitAL EXPERIMENT STATION, ItHACA, N. Y. 



AERATION AND AERATOIiS. 



The matter of aeration and proper cooling of milk is one 

 of prime importance to daii'jmen, and pai'ticuiarly to iLulk ship- 

 pers. Attention has been called to this factor in the keepiug of 

 milk only comparatively recently and during the past year there 

 have been sent to us several forms of aerators and coolers with the 

 request that a test be made of their comparative merits and advan- 

 tages. Accordingly tests of the following aerators have been 

 made: They were respectively the " fc>tar Milk and Cream Cooler," 

 manufactured by Evans & Heulings, Haddonheid, N. J. Two 

 corrugated sheets of tin are placed near togethiir and so arriuiged 

 that a stream of water hows constantly between them on the 

 inside; at the same time the milk to be cooled drips slowly 

 over the outside of the corrugated tins. This machine requires a 

 connection with running water, or if running water is not at 

 hand, water must be supplied by means of a tank suitably ele- 

 vated to give sufdcient pressure. (Second, the "Champion Aiiik 

 Cooler," manufactured by the Champion Milk Cooler Company, 

 Cortland, N. Y. This cooler consists of a conical dn vessel 

 arranged to hold ice water. Upon this vessel is fixed a receiving 

 tank, from which the milk drops in a fine btream and passes 

 down the sides of the main tank and is collected at the bottom. 

 Thii'd, the "Powell" aerator, manufactured by J. D. Powell, 

 Goldens Bridge, N. Y. This instiument is intended to aerate with- 

 out cooling and acts upon the principle of forcing air through 

 milk contained in an ordinary can. It is veij simple, consisting 

 merely of a hollow tin plunger with small perforations on the 

 upper side, this instrument being plunged into the milk carries 

 with it air which, escaping from the perforations, bubbles up 

 thi'ough the milk and so aerates it. 



Tlie followiug tests show the capacity of the *' Star " aerator. 

 It was connected with the University water-works through a 

 half-iuch pipe and the water was allowed to liow through con- 

 stantly at full head. 



