812 



STARCHES OF CANNACE^. 



Differentiation of Certain Starches of the Genus Canna. — Continued. 



Effkcts of Various Reaqents. — Continued. 

 Reaction with Ferric Chloride. — Continued. 



C. musaefolia: Begins in l}/i minutes; complete in 25 

 minutes. 



C. edtUis: Be^^ns in 4 minutes; complete in 45 minutes. 



C. vox. {Kimigen Charlotte): Begins in a minute; com- 

 plete in most in 7 minutes, and in all in 18 min- 

 utes. 



C. var. {President Camol): Begins in 45 seconds; com- 

 plete in most in 9 minutes, and in all in 15 min- 

 utes. 



C. var. (L. E. Bally): Begins in IJ^ minutes; complete 

 in most in 10 minutes, and in all in 22 minutes. 



C. var. (Mrs. Kate Grey): Begins in a minute^ complete 

 in most all in 10 minutes, and in all m 16 min- 

 utes. 



C. var. (Jean. Tissol): B^egins in a minute; complete in 

 nearly all in 10 minutes, and in all in 23 minutes. 



C. var. (/. D. Eisde): Begins in 1}^ minutes; complete 

 in most in 12 minutes, and in all in 20 minutes. 



Effects of Vaeious Reagents. — Continued. 

 Reaction with Purdy's Solution. 



C. warszewiczii: Begins in a few seconds; complete in 



2 minutes. 

 C. roscoeana: Begins in 15 seconds; complete in 5 



minutes. 

 C. muscefolia: Begins in 15 seconds; complete in 6 minutes. 

 C. edvlis: Begins in 15 seconds; complete in 3 minutes. 

 C. var. {K6nigen Charlotte): Begins in a few seconds; 



complete in IJ^ minutes. 

 C. var. (President Camot): Begins at once; complete in 



40 seconds. 

 C. var. (L. E. Bally): Begins at once; complete in a 



minute. 

 C. var. (Mrs. Kale Grey): Begins at once; complete in 



30 seconds. 

 C var. (Jean Tissot): Begins in a very few seconds; com- 

 plete in 2 minutes. 

 C. var. (J. D. Eisele): Begins at once; complete in 



45 seconds. 



NOTES ON THE STARCHES OF CANNA. 



There are variations, mostly of a minor character, in the forms, sizes, hila, and lamellae, which 

 are useful in the differentiation of the seveial starches. In their reactions, the differences are suf- 

 ficient, but not, on the whole, marked, to enable the distinction of one from another; and it will be 

 noted upon a comparison of the reaction-curves that there is a general correspondence in the curves 

 of the first four specimens (four species), and also of the curves of the six horticultural varieties 

 that follow. 



