. Botany, an elementary text for schools. Botany. TEANSPIRATION. mist soon accumulates on the inside of the glass. In time drops of water form. The experiment may be varied as shown in Fig. 116. Or invert the fruit-jar over an entire plant, as shown in Fig. 117, taking care to cover the soil with oiled paper or rubber cloth to prevent evaporation from the soil. Even in winter moisture is given off by leafless twigs. Cut a twig, seal the severed end with wax, and allow the twig to lie several days: it shrivels. There must he some up- ward movement of inifer trtii in â winter, else plants ivould
. Botany, an elementary text for schools. Botany. TEANSPIRATION. mist soon accumulates on the inside of the glass. In time drops of water form. The experiment may be varied as shown in Fig. 116. Or invert the fruit-jar over an entire plant, as shown in Fig. 117, taking care to cover the soil with oiled paper or rubber cloth to prevent evaporation from the soil. Even in winter moisture is given off by leafless twigs. Cut a twig, seal the severed end with wax, and allow the twig to lie several days: it shrivels. There must he some up- ward movement of inifer trtii in â winter, else plants ivould shrivel and die. Wluii tlic roots fail to suj)- plij to tin plant sufficient tvaft r to equalize that transpired Jnj the leaves, the plant wilts. Transpiration from the leaves and delicate shoots is increased by all of the conditions which would increase evaporation, such as higher temperature, dry ail- or wind. The breathing i)()res are so constructed that they open and close wilii the varying conditions of the atmosphere, and thereljy regulates transpiiation. iIo\vc\cr, during i)eriods of drought or of Xi'vy hot wcMtlicr, and during a hot Avind. llic dosing of these stoniatcs cannot snflicienily |ife\ciit e\a|iorat ion. The roots may he vci'v acti\e and .\ct tail to alisorl) sntlieieiit nioislni'c to e(|naliz(; that given olT hy the h>a\-es. Tiie jihaiit wihs. Any injury to the roots or e\cn ehilling them (14!>) nia.\ cause tlie plant to wilt. On a hot, (h\ (hi.\ noti- liow the leaves of com "roll'' towai'ds at'lern(»oii. I']ail.\ tln' fol- lowing iiioining note how tVesh and \ igoi-ous the same leaves appear. Water is also forced up liy i-oot - lu'cssui'c (14G). Some of tlu' dew on the grass in the m(»niing 117 T" ilhistrato Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly r
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Keywords: ., bookauthorbai, bookcentury1900, bookdecade1900, booksubjectbotany
