FROM THE PRACTICAL VIEWPOINT 



tion, then a rinsing with hot water, after which 

 clean water is forced into them, which is near the 

 boiling temperature, and sometimes a final jet of 

 live steam is forced into the bottles. If the final 

 rinse water is clean and hot, and the steam is ap- 

 plied long enough, the bottles leave the machine 

 at a temperature of from 150 to 170, and are 

 reasonably free from bacteria. 



Several points are to be borne in mind in using 

 a machine of this kind. In the first place, no ma- 

 chine can be depended upon to fully clean an 

 extremely dirty bottle, particularly those which are 

 returned from the bottle exchanges and the dumps. 

 Such bottles should first be washed by hand upon 

 revolving brushes, where they can be clearly seen 

 by the workman. They should then be washed again 

 in the regular jet- washing machine. Another im- 

 portant point is that the perforations in the wash- 

 ing plates are liable to become clogged either with 

 particles of dirt, or with rust, or it may be with 

 deposits which are thrown down from water which 

 is very hard. If these openings are stopped up 

 it will mean that some bottles are not washed as 

 it is intended they should be, and dealers may be 

 unable to account for an unusually large number 

 165 



