. Handbook of nature-study for teachers and parents, based on the Cornell nature-study leaflets. Nature study. Sky Study 915 Another excellent observation lesson for teaching the fact that the sun travels farther south in the winter, is to measure the shadow of a tree on the school grounds at noonday once a month during the school year. The length of the tree shadow can be measured from the base of the tree trunk, a memorandum being made of it. 14. When does the stick or tree cast its longest shadow at noon—in December or February ? February or April ? April or June ? Why ? Topics for English
. Handbook of nature-study for teachers and parents, based on the Cornell nature-study leaflets. Nature study. Sky Study 915 Another excellent observation lesson for teaching the fact that the sun travels farther south in the winter, is to measure the shadow of a tree on the school grounds at noonday once a month during the school year. The length of the tree shadow can be measured from the base of the tree trunk, a memorandum being made of it. 14. When does the stick or tree cast its longest shadow at noon—in December or February ? February or April ? April or June ? Why ? Topics for English themes—The size and distance of the sun. The heat of the sun and its effect upon the earth. What we know about the sun spots. Our path around the sun. Supplementary reading—Starland, Ball; The Earth and Sky, A sundial made by pupils. LESSON CCXXXIII How TO Make a Sundial Method—The diagram for the dial is a lesson in mechanical drawing. Each pupil should construct a gnomon (no-mon) of cardboard, and should make a drawing of the face of the dial upon paper. Then the sundial may be constructed by the help of the more skillful in the class. It should be made and set up by the pupils. A sundial in the school grounds may be made a center of interest and an object of beauty as well. Materials—For the gnomon a piece of board a half inch thick and six inches square is required. It should be given several coats of white paint so that it will not warp. For the dial, take a board about 14 inches square and an inch or more thick. The lower edge may be bevelled if desired. This should be given three coats of white paint, so that it will not warp and check. To make the gnomon—The word gnomon is from a Greek word meaning "one who ; It is the hand of the sundial, which throws its shadow on the face of the dial, indicating the hour. Take a piece of board six inches square, and be very sure its angles are right angles. Let s, t, u, v represent the four angles
Size: 1655px × 1509px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorcomstockannabotsford1, bookcentury1900, bookdecade1910
