CONTENTS 
Page 
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Description of modifications: 
Desiccant holders .............. oooD DOOM OUODC OD OOO BHOaO AG OOOO oOOS 1 
External ''C'" battery unit and associated circuitry ..............+e0.> 3 
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Modiftrcationyot cellgholdeirarercieeiaielens clelotereie/ i ielisicuelsrenenalcietstiel sells) ecules) aneie 4 
Disicusisiongand CONCIUSIONS! ccs see) «)s cis) oiele) oils lellet's elie o1 efaieilel ef eilel oie’ of) siete) fs Te) s) orc) s 5 
FIGURES 
1.--Modified Beckman DU Spectrophotometer.............c00-e+ceccceces iv 
2.--View of modified cell compartment and phototube housing ........... : iv 
3.--Diagrammatic representation of Spectrophotometer modification...... 3 
4.--Diagram of wiring in ''C"' battery unit and meter test unit 
(Terminal strip positions B and Care connected to the yellow and white 
leads in the Beckman DU Spectrophotometer, respectively.).......... 4 
5.--Wiring diagram (semidiagrammatic) of battery charger unit.......... 5 
iii 
