140 KEITH R. PORTER 



the smooth ER appeared initially in association with glycogen deposits and 

 that concomitantly with their development the glycogen was depleted and 

 did not reappear while the dye was included in the diet. It was these 



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observations that stimulated an investigation into the possible relationship 

 between the smooth ER and glycogen metabolism which is still continuing. 

 The following summary is drawn from experiments made in collaboration 

 with Drs. Giuseppe INIillonig and Thomas Ashford. Detailed accounts of 

 the results will be published elsewhere. 



