W. A. Davis, A. J. Daish and (I. C. Sawyer 267 



and the portions which were at first at the bottom (and therefore less 

 completely extracted and still green in colour) put back at the top, 

 where the alcohol is hotter and acts more efficiently. In carrying out 

 a series of pickings every 2 hours over a period of 24 hours, we have 

 used four large extractors, the later samples being put into the apparatus 



-6/2"- 



» 



g ^iili'iyf lFi 



•a,m,jtim.mirsi-immim.,ummmt,rm'/im»iii^nm 



Fig. 1. Extraction apparatus. \ size. 



as soon as the earlier samples were completely extracted. Three smaller 

 apparatus served to deal with stalks and mid-ribs. 



When extraction is complete (as judged by the leaves being practically 

 colourless) the alcohol in the extractor is allowed to siphon over into B 

 as completely as possible and the leaves are transferred to a small 



