Cassava Starch.—This variety of starch is obtained from the root of the sweet cassava, which grows in great profusion in Florida. It is compared with maize starch in Figs. [60] and [61]. In the illustration the granules are represented as magnified 150 diameters. The grains of the cassava starch measure about 0.012 millimeter in diameter and resemble very nearly maize starch, except that they have greater evenness of outline.[169]
For further descriptions of starch grains the reader is referred to the work of Griffith, already cited.
These descriptions, it will be seen, do not agree entirely with those of some other authors, but they are based on a somewhat extensive experience.
There are peculiarities of size, shape and appearance of starch granules, which must be allowed for, and the necessity for every investigator to compare a starch which he is desirous of identifying with authentic specimens, must always be recognized.
AUTHORITIES CITED IN PART SECOND.
[23] Vines, Vegetable Physiology.
[24] Berichte der deutschen chemischen Gesellschaft, Band 23, S. 2136; Stone, Agricultural Science Vol. 6, p. 180. Page 59, eighth line from bottom insert “original” before “optical.” Page 60, second line from top, read d instead of l fructose.
[25] Herles, Zeitschrift des Vereins für die Rübenzucker-Industrie, 1890. S. 217.
[26] Tucker; Wiechmann; Sidersky; von Lippman; Tollens and Spencer.
[27] Bulletin No. 28, Department of Agriculture, Division of Chemistry, p. 197.