126 



ROBERT CHAMBERS. 



FIG. 2. Double pipette holder set up for microdissection. a. Carrier with 

 groove to hold needle, b, brass plate which slips sideways over the groove in 

 which needle lies. (The undersurface of the plate is covered with -blotting paper 

 to give it resiliency where it comes into contact with the glass needle.) c, set screw 

 to clamp plate on carrier, d, screw which, on loosening, allows carrier to be set 

 at any angle, e-h, screws to move the needle (e side to side, / up and down, 

 g in and out, h side to side for both carriers together), j, shelf to which instru- 

 ment is clamped. 



