C. A. BARBER 



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considered here, in that the varieties were grown together in adjoining plots 

 under similar conditions. The first set of figures was obtained in the 1916 

 crop when seven of the Saretha and 10 of the Sunnabile groups were measured 

 and the second was obtained in the 1917 crop when 18 of the Saretha and 15 

 of the Sunnabile group were grown. The measurements are summarized in 

 the following table, where in each variety 20 canes were measured in detail 

 from ground level to the young growing point. 



Average cane measurements in the Saretha and Sunnabile groups. 



The length of stripped cane, from ground level to the first joint at the 

 apex one-tenth of an inch in length, is constantly greater in the Saretha 

 series, whereas the average number of joints is as constantly less in this 

 group. It is not therefore surprising to note that the average length of 

 mature joints (omitting the last eight, immature ones at the apex) is greater 

 in the Saretha than in the Sunnabile group. 



The thickness of cane has been averaged as described in the next para- 

 graph, and there is a close approximation between the results obtained and 

 those taken more casually, in a general survey of the whole of the canes of 

 each variety at crop time, when they were laid out on the ground. The canes 

 of the Sunnabile group are, on the average, thicker than those of the Saretha 

 series. And this fact, taken with their comparative shortness, causes the 

 cane module (length divided by thickness) to show a greater difference still. 

 The cane module is much higher in the Saretha group, indicating that, 

 as a class, the canes are thinner and longer than those of the Sunnabile 

 varieties. 



(2) Ocalness and thickness in different parts of the cane. The estimation 

 of these is based upon the same series of measurements. To obtain the 



