THE BIOLOGY OF STENTOR 



Fig. 97. Equipment for operations on stentors. 



A. Glass needle drawn from soft glass rod for cutting; 

 eyelash fastened to handle for rolling over specimens to 



examine all sides when following operated animals. 



B. Moist chamber, a plastic sandwich box with wet filter 

 paper on the bottom and depression slides stacked on 2 bridges. 



C. Bench for operating. As he bends over microscope, 

 operator automatically presses hinge at edge which turns on 

 spring switch and embryological lamp. Bench top used for arm 

 rests. Ordinary blue light below hole in bench is used in 

 searching culture samples by transmitted light. Both sources 



of illumination have glass heat filters. 



D. Canning funnel covered with drum-head of fine bolting 

 silk and immersed in culture jar, for maintaining large fusion 



masses under optimum conditions. 



E. Operating slide to which a square of finely woven fabric is 

 applied with melted paraflSn carries large drop of methyl 

 cellulose into which stentors have been introduced with the 



micropipette. 



