THE BABCOCK TEST 



51 



-^^ 



FIG. 24 — TEST-BOTTLE DRAINING RACK 



cc. of a solution, consisting of one ounce of potassium 

 bichromate dissolved in one pint of sulphuric acid. 



Then a test-bottle brush 

 is run once up and down 

 the neck of each bottle, 

 and finally each is well 

 rinsed with hot water. 

 There are available 

 several devices which 

 may be found convenient 

 and time-saving where 

 many bottles are used 

 daily. Among these de- 

 vices may be mentioned 

 a bottle-rinser (Fig. 23), 

 a drain-rack (Fig. 24), 

 and a bottle- 

 washer (Figs. 

 25a, b, and c), 

 described by 

 Farrington 

 (Bulletin 129, 

 Wis. Agr. Exp. 

 Station, pp. 22- 



BOTTLE- HOLDER, EMPTY ^4) • 



