264 



TITRIMETRIC METHODS 



Fig. 91. Leveling bulbs for use with micropipettes. 

 From Loscalzo and Benedetti-Pichler (1945) 



Housing for cuvette holder 



Cuvette holder, 4 x l4 cm 



Electromagnetic stirrer 



Micro cell, 8 mm. outside diameter 



Photo cell 



Light 

 source 



Path of 

 ight beam 



Spring clip to press 

 cuvette into place 



Electromagnet 

 with protruding core 



Fig. 92. Detailed diagram of microcuvette in holder, 



showing relationship of electromagnetic stirrer to light beam. 



From Zamecnik, Lavin, and Bergmann (1945) 



