. Handbook of nature-study for teachers and parents, based on the Cornell nature-study leaflets. Nature study. the cob shows distinctly that the rows are paired. The corn-silk is the style of the pistillate flowers; and therefore, in order to secure pollen, it must extend from the ovule, which later develops into a kernel, to the tip of the ear, where it protrudes from the end of the husk. A computation of the number of kernels in a row and on the ear makes a very good i,Theanlhersofcorn; 2, arithmetic lesson for the primary pupils, especially flU^f/ "{."^JZl'-^'f as the kernels occu
. Handbook of nature-study for teachers and parents, based on the Cornell nature-study leaflets. Nature study. the cob shows distinctly that the rows are paired. The corn-silk is the style of the pistillate flowers; and therefore, in order to secure pollen, it must extend from the ovule, which later develops into a kernel, to the tip of the ear, where it protrudes from the end of the husk. A computation of the number of kernels in a row and on the ear makes a very good i,Theanlhersofcorn; 2, arithmetic lesson for the primary pupils, especially flU^f/ "{."^JZl'-^'f as the kernels occu r in pairs. ThT"pistillate ^^^flower, which will develop into The Growth of the Corn the kernel. If we cvrt a kernel of com crosswise we can see, near the point where i^ joins the cob, the little plant and the root. Com should be germinated between wet blotters, in a seed-testing experiment, before observations are made on the growing com of the fields. When the com first appears, the com leaves are in a pointed roll which pierces the soil. Soon they spread apart, but it may be some time before the corn-stalk proper appears. Then it stretches up rapidly, and very soon will be tipped with beautiful pale brown tassels. These tassels merit careful study for they are the staminate flowers. Each floret has two anthers hanging down from it, and each half of each anther is a little bag of pollen-grains; and in order that they shall be shaken down upon the waiting corn-silk below, the bottom of each bag opens wide when the pollen is ripe. The corn-silk, at this stage, is branched at the tip and clothed with fine hairs, so that it may catch a grain of the precious pollen. Then occurs one of the most wonderful pollen stories in all nature, for the pollen-tube must push down through the center of the corn-silk for its whole length, in order to reach the waiting ovule and thus enable it to become a kernel of com. These young, unfertilized kernels are pretty objects, looking like seed
Size: 1225px × 2040px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorcomstockannabotsford1, bookcentury1900, bookdecade1910
