70 



plat, Serial No. 170, 1890, cut on the one hundred and twenty-second day : Sucrose, 

 8.00; purity, 62.69; glucose, 1.43; nonsugars, 3.33. Best average sample from deri- 

 vate plat, Serial No. 4, 1891, cut on the one hundred and forty-ninth day : Sucrose, 

 12.85; purity, 78.21; glucose, 1.52; nonsugars, 2.06. 



Plat B (Colliers}. Planted March 30 with mixed selected seed from canes grown 

 in Calumet Plat No. 22, 1890. Analysis of an average sample from parent plat, Se- 

 rial No. 106, 1890, cut on the one hundred and nineteenth day : Sucrose, 16.60; purity, 

 77.14; glucose, 0.69 ; nonsugars, 4.23. Best average sample from derivate plat, Serial 

 No. 11, 1891, cut on the one hundred and fifty-fourth day: Sucrose, 18.35; purity, 

 81.11; glucose, 0.61; nonsugars, 3.65. Though much injured by drought, this plat 

 gave a good stand. Barrenness of panicles as pronounced as in all plats of this 

 variety. 



Plat C (Link's Hybrid). A failure; only half a dozen canes were produced. 



Plat I) (Colman Cane). Planted March 30 with mixed selected seed from canes 

 grown in Calumet Plat A, 1890. A very fair stand of handsome stocky uniform canes. 

 Average of ninety-six single stalk analyses of parent plat, 1890: Sucrose, 15.12; 

 purity, 75.94. Best average sample from derivate plat Serial No. 30, 1891, cut on its 

 one hundred and seventy-fifth day : Sucrose, 18.90 ; purity, 81.47 ; glucose, 0.57 ; 11011- 

 sugars, 3.73. This was in all points the best plat grown in 1891. Although designed 

 for average sample work only, yet owing to the inferior canes afforded by the single 

 head plats of Colinaii cane two days of seed selection work were given to this plat, 

 but the canes were so taken as to interfere scarcely at all with the value of the aver- 

 age samples. 



Average samples from the foregoing lettered plats were drawn by cutting ten con- 

 secutive canes at each sampling, beginning at one end of the row and progressing 

 toward the other. Samples were taken from all the plats on the same date and at 

 (usually) weekly intervals throughout the season. A sample was in the same manner 

 taken from a row of the forage sorghum adjoining Plat A on each occasion. 



SECOND SERIES PLANTED FROM SINGLE HEADS FOR SEED SELECTION. 



The second series of plats, all from single heads, were planted on June 8, after 

 newly plowing out the rows, in the same field and in alternation with the plats of 

 the earlier scries. The conditions of weather which prevailed during the period 

 between June 8 and October 15 favored a steady and regular growth. A perfect 

 stand was had in all these plats. The cultivation was similar to that given the first 

 series, but better timed. 



Plats and varieties were as follows: 



Plat No. 2 (Early Orange). Derived from the second best single cane selected from 

 Calumet Plat B, 1890. Juice analysis of this cane, Serial No. 455, 1890, cut on its 

 one hundred and seventh day: Sucrose, 14.75; purity, 76.50. Best single stalk of 

 derivate plat, Serial No. 591, 1891, cut on the one hundred and ninth day : Sucrose, 

 16.90; purity, 80.67; glucose, 0.98; nonsugars, 3.07. Panicles fully out by the sixty- 

 eighth day, seed-hardening by the ninety-third day. A handsome plat, canes of 

 fair size, and remarkably regular in form and type. 



Plat No. 4 (Etd Liberian). (It was decided to discontinue the variety, and no an- 

 alytical work was done upon the plat.) 



Plat No. 6 (Link's Hybrid). Derived from the best single cane selected from Calu- 

 met Plat C, 1890. Juice analysis of this cane, serial No. 496, 1890, cut on the one hun- 

 dred and ninth day: Sucrose, 15.60; purity, 78.54; glucose, 0.36; nonsugars, 3.52. 

 Best single stalk of derivate plat, Serial No. 814, 1891, cut on the one hundred and 

 twenty-seventh day: Sucrose, 16.39; purity, 79.99; glucose, 0.65; nousugars, 3.45. 

 Panicles fully out by the sixty-eighth day, seed hardening by the ninety-third day. 

 Canes slenderer than those of Plat No. 5 of the same stock, first series. 



Plat No. 8 (Collier's). Derived from the best single cane selected from Calumet Plat 

 No. 22, 1890. Juice analysis of this cane, Serial No. 403, 1890, cut 011 the one hundred 



