Cane sugar; a textbook on the agriculture of the sugar cane, the manufacture of cane sugar, and the analysis of sugar-house products . 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 traversedlongitudin
Cane sugar; a textbook on the agriculture of the sugar cane, the manufacture of cane sugar, and the analysis of sugar-house products . 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 to 30 Fig. 4 Cross-section of a portion of healthy cane leaf taken half-way between themidrib and the margin near the middle of a full-grown but not yet fully lignjfiedleaf. The uppef side of the figure, i to 18, represents the top surface of the fructifications of the leaf-splitting disease occur in positions corresponding to3, 4, 5. The green chlorophyll bodies are here shown black. It is owing to thedestruction of these green bodies in portions of the leaf such as here represented,namely, between the largest vascular bundles, that the leaf takes on a stripedappearance. The part of the leaf to be examined was fixed with the vapour ofosmic acid while still attached to the cane plant. The fixed portion was differenti-ated into glycerine and cut in that condition. The drawing was projected from aphotograph and sketched. The details were drawn in from the examination ofsections either unstained or stained with aniline safranin. The section shows fivefibro-vascular bundles, the
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectsugar, bookyear1921
