A treatise on physiology and hygiene for educational institutions and general readers .. . -sugar?Cane-sugar ? 76 THE CHEMISTRY OF FOOD. nine per cent.; the maple-tree of our climate yields a similar sweet taste of fruits is due to the presence of grape-sugar: thewhite grains seen on raisins belong to this variety. Cane-sugar ismore soluble than the latter, and has twice the sweetening power.{Read Note 10.) 25. Starch.—This is the most widely distributed of the vegetableprinciples. It is tasteless, inodorous, and does not crystallize. Itconsists of minute rounded granules, which, und
A treatise on physiology and hygiene for educational institutions and general readers .. . -sugar?Cane-sugar ? 76 THE CHEMISTRY OF FOOD. nine per cent.; the maple-tree of our climate yields a similar sweet taste of fruits is due to the presence of grape-sugar: thewhite grains seen on raisins belong to this variety. Cane-sugar ismore soluble than the latter, and has twice the sweetening power.{Read Note 10.) 25. Starch.—This is the most widely distributed of the vegetableprinciples. It is tasteless, inodorous, and does not crystallize. Itconsists of minute rounded granules, which, under the microscope,reveal a somewhat uniform structure (Fig. 19). Starch will not dissolve in cold water, but inboiling water the small grainsburst open, and may then bedissolved and digested. 26. The breadstuffs—wheat,corn, and rye flours—are morethan one-half starch. Eice,which is the staff of life toone-third of the human family,contains eighty per cent. Un-ripe fruits have much starch inthem, which renders them in-digestible when eaten uncooked,for the grains of raw starch are. Fig. 19. -Granules of Potato Starch Mag-nified. 10. Why too much Sugar is Injurious.— Sugar is very wholesome,and, as I told you, we want some in our diet. But children will often eat toomuch sugar, just as they will eat too little fat. The harm it does them is—first, it is very apt to s^cil the teeth ; second, it takes away the appetite forother food. If you are always eating sweet cakes and sugar-plums, you willnot care for plain, nourishing diet. Now, what is best for us all is, to havegood appetites for wholesome food; it will do more to keep us in health all ourlives than anything else ; ami there is a great deal in getting the right habitCandies are frequently adulterated with plaster-of-paris, chalk, and certainforms of earth, that are indigestible ; but worse than that, the coloring mat-ters and flavoring extracts that are used in the bright-tin ted and fruity-flavored confectionery
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