. The elements of materia medica and therapeutics (Volume 2) . When their circular hilum cracks, it fre-quently forms two slightly diverging rents (see fig. 137). 1 have two varieties of potato sago, one in grains, about the size of those of pearl sago (p>earlpotato sago), the other Particles of Potato Sago. in larger sized grains, received from Professor Guibourt, who tells me it is made near Paris. (See Potato Starch.) Commerce.— The quantity of sago, on which duty was paid in 1840, was 26,895 cwts. (Trade List.) It is brought from Singapore, in bags, &c. The quantity imported into France
. The elements of materia medica and therapeutics (Volume 2) . When their circular hilum cracks, it fre-quently forms two slightly diverging rents (see fig. 137). 1 have two varieties of potato sago, one in grains, about the size of those of pearl sago (p>earlpotato sago), the other Particles of Potato Sago. in larger sized grains, received from Professor Guibourt, who tells me it is made near Paris. (See Potato Starch.) Commerce.— The quantity of sago, on which duty was paid in 1840, was 26,895 cwts. (Trade List.) It is brought from Singapore, in bags, &c. The quantity imported into France, in 1834, was 41,312 lbs. (Planche, Journ. de Pharm. xxiii. 116.) Composition.—Sago has not been analyzed; but its composition is presumed to be analogous to that of other starchy bodies (vol. i. p. 87). Chemical Characteristics.—Sago possesses the characteristics of ordinary starch. A cold decoction forms a blue compound (iodide of starch) with iodine. A filtered infusion (prepared with cold distilled water) of pulverulent sago, or 8* Fig. 90 ELEMENTS OF MATERIA MEDICA. of brown sago, undergoes no change of colour on the addition of a tincture ofiodine. But a similar infusion of pearl sago becomes blue with iodine. Thisevidently depends on the latter having been submitted to some process by whichthe starch globules have become broken. The cold infusion of brown sago isrendered milky by nitrate of silver, diacetate of lead, and protonitrate of mercury;but the cold infusions of pulverulent and of pearl sago are scarcely affected bythese tests. Physiological Effects.—It is nutritive and easy of digestion, and is an im-portant article of food in some parts of the East. The Malay sago palm, saysDr. Roxburgh, is the tree, the pith of which is the staff of life to the inhabitantsof the Moluccas. Uses.—Sago puddings are occasionally brought to table. But the principal useof sago is to yield a light, nutritious, easily digestible, and non-irritating article offood for
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