. Handbook of nature-study for teachers and parents, based on the Cornell nature-study leaflets. Nature study. 856 Handbook of Nature-Stud-y 9. "When a pond begins freezing over, what part ot it freezes first? Describe how the first layer of ice is formed over the surface. 10. Place a bottle of water out of doors in freezing weather. How does the ice appear in it at first? What happens later? Why does the bottle break? How is it that water which has fiUed the crevices of rocks scales off pieces of the rock in cold weather? Why does winter wheat "winter-kill" on wet soil? 11. Why
. Handbook of nature-study for teachers and parents, based on the Cornell nature-study leaflets. Nature study. 856 Handbook of Nature-Stud-y 9. "When a pond begins freezing over, what part ot it freezes first? Describe how the first layer of ice is formed over the surface. 10. Place a bottle of water out of doors in freezing weather. How does the ice appear in it at first? What happens later? Why does the bottle break? How is it that water which has fiUed the crevices of rocks scales off pieces of the rock in cold weather? Why does winter wheat "winter-kill" on wet soil? 11. Why does frost form on a window-pane? How many different figures can you trace on a frosted pane ? Are there any long, needlelike forms? Are there star forms? Can you find forms that resemble ferns and trees? Do you sometimes see, on boards or on the pavement, frost in forms like those on the window-pane ? 12. When there is a fine, dry snow falling, take a piece of dark flannel and catch some flakes upon it. Examine them with a lens, being careful not to breathe upon them. How many forms of snow crystals can you find? How many rays are there in the star-shaped snow crystals ? Do you find any solid crystals? Can you find any crystals that are triangular? When the snow is falling in large, feathery flakes, can you find the crystals? Why not? 13. What is the difference between a hailstone and a snow crystal ? What is sleet ? Supplementary reading—Water Won- High cloud snow crystal. ders, Thompson; Forms of Water, Tyndall. Photomicrograph by w. a. Bentiey. "When in the night we wake and hear the rain Which on the white bloom of the orchard falls. And on the young, green wheat-blades, where thought recalls How in the furrow stands the rusting plow. Then fancy pictures what the day will see— The ducklings paddling in the puddled lane. Sheep grazing slowly up the emerald slope, Clear bird-notes ringing, and the droning bee A mong the lilac's bloom—enchanting hope—• How fai
Size: 1575px × 1587px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorcomstockannabotsford1, bookcentury1900, bookdecade1910
