Cane sugar; a textbook on the agriculture of the sugar cane, the manufacture of cane sugar, and the analysis of sugar-house products . inthe leaf remains unchanged when it reaches the joint, and the reducing sugars are used up, partly in respiration, or,perhaps, are partly converted by a reverted enzyme action into sucrose. 4. When the stalks are developed, the accumiilated invert sugar isconverted into sucrose; of the reducing sugars remaining the glucose isgenerally in excess. 5. When the stalks are ripe the leaves die and the accumulation ofsugar gradually ceases ; the remainder of the redu
Cane sugar; a textbook on the agriculture of the sugar cane, the manufacture of cane sugar, and the analysis of sugar-house products . inthe leaf remains unchanged when it reaches the joint, and the reducing sugars are used up, partly in respiration, or,perhaps, are partly converted by a reverted enzyme action into sucrose. 4. When the stalks are developed, the accumiilated invert sugar isconverted into sucrose; of the reducing sugars remaining the glucose isgenerally in excess. 5. When the stalks are ripe the leaves die and the accumulation ofsugar gradually ceases ; the remainder of the reducing sugars is changedto sucrose, eventually only traces remaining. 6. When the stalks are over-ripe the sucrose in the older joints is partlyinverted, but this change does not prevent the younger parts of the caneaccumulating sugar. The Leaf.—The leaves of the cane are alternate and opposite, one ateach joint; actually, the leaf consists of two paits, the leaf sheath and theleaf blade. The leaf sheath springs from the node. It completely embraces,at its base, the stalk, and gradually recedes from it; the sheath is colourless. Fig. 3 THE CAXE 5 or pale green, and about 12 inches long at maturity. The blade is from3 to 4 feet long, and 2 to 3 inches %\ide ; in colour the leaves are varyingshades of green; in some varieties variegated or entirely white leaves areoften developed. Some canes (5. violacetim) have purple leaves. The leavestaper towards the top, and are deHcately serrated along the margin ; inmany varieties seta or hairs abound at their base. The leaf is traversedlongitudinally by a number of veins. The midrib is generally white, butsometimes reddish or purple, and is formed vdth a channel-like depressionin its upper siirface. Leaves at matiirity fall away from the stalk, and insome varieties separate themselves entirely. Structure of the Leaf.—In Fig. 4 is shown a cross section of a leaf of tliecane, to which must be added Dr. Cobbs explanation of the
Size: 1456px × 1716px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectsugar, bookyear1921
