272 



Br HarLridge, Colourimeier Design 



Eyepiece Cup - 



Ramsden eyepiece • 



Comparison field 



Comparison field 



Plunger ■ 



Staa;e - 



Tail piece to carry lamp 



f*ush-on terminals 

 Horse-shoe foot 



Opal glass disc 

 Watt lamp 



