24 THE PRODUCTION OF VOLATILE OILS AND PERFUMEEY PLANTS, 



the periphery of the cover is securely fastened a flat collar of iron 

 of the same diameter as the angle iron used on the top of the still, 

 so that with the cover in place the tAvo will exactly coincide. 



Fig. 4. — Distilling and condensing apparatus. .1, Still ; B, still head or cover ; C, con- 

 denser ; D, receiver; E, steam pipe; F, spigot; G, tripod; H, screen. 



The condenser, C, as shown in figure 4, consists of a group of 

 tubes (inside diameter one-half to 1 inch, depending upon the size 

 of the condenser) surrounded by an outside jacket fitted with an 

 inlet tube at the bottom and an outlet tube at the top, to enable cold 



195 



