175 



10 20 30 40 50 60 70 80 

 LENGTH, mm 



Fig. 55. 



Fig. 56. 



Fig. 57. 



Fig. 55. Pipette for transfer of digested sample in nitrogen determination. 

 From Brilel et al. (1946) 



Fig. 56. Allowable variation in dimensions of pipette in Fig. 55. From 

 Brilel et al. (1946) 



Fig. 57. Dimensions of constriction pipette for pipetting acid used to absorb 

 ammonia in nitrogen determination. From Brilel et al. (1946) 



y 



-X 



■ 45 n\. 



-Y 



-A/il. 



Fig. 59. Horizontal mouth-operated 



pipette with vertical delivery tip. 



From Brilel et al. (1946) 



Inner diameter 0.35 mm. 

 Outer diameter 0.70 mm. 



Fig. 58. Constriction pipette 

 for placing liquid seal across 



neck of reaction tubes. 



From Brilel et al. (1946) 



Fig. 60. Auto- 

 matic pipette. 

 From Linderstr0m- 

 Lang and Holler 

 (1931) 



