FROM THE PRACTICAL VIEWPOINT 



which is forced into the bottles for the final rinse, 

 instead of falling back into the tank from which 

 it is pumped, is carried back into the tank behind 

 it. From here it can be properly used for the pre- 

 liminary rinsing of the bottles. The use of fresh, 

 clean water for final rinsing is somewhat expen- 

 sive when a public water supply is used, and also 

 a good deal of steam is required to heat it, but in 

 order to obtain sterile bottles it is necessary. For 

 heating this water use can be made of the exhaust 

 steam from engines and pumps, and thus heating 

 expenses may be cut down. 



There is one form of automatic washing ma- 

 chine in which the bottles which are being treated 

 are forced down into successive tanks of water, and 

 the inverted bottles are pushed over fingers from 

 which water is forced in a direction somewhat 

 tangent to and also at right angles to the inserted 

 finger. The water as it is forced into the bottle 

 has therefore somewhat of a scouring action. This 

 is of advantage in removing dirt which has ad- 

 'Jiered to the glass. In this machine, also, the 

 water which is used for the final rinse is heated 

 under pressure, and as a result, when it is forced 

 into the bottle, its temperature is frequently above 



167 



