TESTING CREAM BY THE BABCOCK TEST 



77 



the reading. In the case of bulb- 

 necked bottles, a special difficulty is 

 introduced because care must be taken, 

 when water is added near the close of 

 the test, so that neither the lower nor 

 upper surface of the fat-column comes 

 within the bulb, making it obviously 

 impossible to read the results without 

 further manipulation. 



(3) Convenience of handling. 

 Bottles with shorter necks are more 

 convenient to handle; they are rilled 

 and cleaned more easily and rapidly. 



(4) Durability. Shorter bottles, 

 when properly made, are more dur- 

 able. Long-necked bottles are top- 

 heavy and more liable to be overturned 

 in handling. The necks of bulb-necked 

 bottles are more easily broken than 

 straight necks. 



Owing to inconvenience of manipu- 

 lation and to larger breakage, bulb- 

 necked bottles are little used now in 

 comparison with straight-necked bot- 

 tles. 



Best forms of cream-testing bot- 

 tles. Several investigations have 

 shown that many of the bottles in use 

 at creameries are wholly incapable of 

 giving sufficiently accurate results. 

 The latest and most exhaustive inves- 

 tigation was carried out by Hunziker 



o 



n 

 =1 



=./ 



/\ 



FIG. 30 

 BULB-NECKED 

 CREAM -BOTTLE 



