THE CONCENTRATION OF THE SYRUP TO MASSECUITE. 



condensed in the coil long before it reached the tail, so that a large portion was 

 so much dead surface. Several devices have been brought out to remedy this 

 defect, one of which is shown in Fig. 191 ; it is known as the ' lyre coil.'' As 

 many as eight coils form a nest in one plane which is tilted a little from the 

 horizontal so as to facilitate drainage ; the ends of the coils pass through 



FIG. 192. 



the walls of the pan into collector boxes. In a pan of this type containing, 

 say, nine nests, the collector boxes will be divided by horizontal partitions 

 into three compartments, to any of which steam can be admitted or cut off 

 independently. 



In these types it is usual to arrange a helical coil within the saucer of the 

 pan. 



345 



