Fig. 10. Photograph of rabbit after recovery from the operation of cannula implantation. 

 For infusion of extracts into the pituitary gland, the stainless steel screw cap and the 

 stilette in the cannula are removed, and the upper end of the cannula connected by fine 

 polythene tubing to a syringe operated by a Palmer slow injection apparatus, by which 

 means infusion is made at a constant rate. 



