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Show WHY LEAVES CHANGE COLOR. 'fl Chemical Elements Produce the Hues We All Know. A leaf ls composed of a great num-oer num-oer of cells, tho walls of which aro brown. In tho spring and summer iheso cells aro all filled with fluid, -olorcd with mlnuto grains of red, lollow and other pigments, which, nixed together, nppear green. In tho autumn, through tho cold, oxidation and other changes take place In tho leaf cells, destroying more or less rapidly certain of tho color elements. As soon as ono of theso oloments is gone tho leaf no longer nppcars a normal green, but assumes tho ahado of tho remainder of the color elements ele-ments mixed togethor. When only tho red element is left the leaf Is red; when tho yellow nlono remains tho leaf Is yollow, and w hen nil tho coloring color-ing matter has gono tho leaf Is brown. Frost is not tho solo causo of tho changes of color, but It Is an Important Import-ant cnuso. Tho moro gradual the changes of temperaturo from summer heat to winter cold, I bo creator will bo tho variety and brilliancy In tho colorings color-ings of tho autumn leaves. Woman's Homo Companion. A Bad Spell. Of 111 students who took an entrance en-trance admission In spelling for Northwestern university clghty-flvo missed twenty or moro words out of a list of 1C0 which was fairly selected wll limit special search for tho unusual nml tho dllllcult. Tho comment of Prof. Clark on tho showing Is: "As long ns tho word method of spelling Ik taught In tho public schools, Just so long will boys and girls enter col-lego col-lego unnblo to spell correctly." New Yiiik Tilbune. |