The second school year; a course of study with detailed selection of lesson material, arranged by months, and correlated . of heat on each. Experiment:—Use three glass vessels. Tie loosely athin cloth over the top of each. Put the same amount ofsoil in each vessel—in one clay, in another loam, and inthe third sand. Pour the same amount of water overeach, and notice that the sand allows the water to passthrough and that the loam holds it. SUGGESTIVE QUESTIONS 1 What is the result if the garden is pure loam andthe season is wet ? Refer to the swamp soil. 2 What is the result if the soil is pure
The second school year; a course of study with detailed selection of lesson material, arranged by months, and correlated . of heat on each. Experiment:—Use three glass vessels. Tie loosely athin cloth over the top of each. Put the same amount ofsoil in each vessel—in one clay, in another loam, and inthe third sand. Pour the same amount of water overeach, and notice that the sand allows the water to passthrough and that the loam holds it. SUGGESTIVE QUESTIONS 1 What is the result if the garden is pure loam andthe season is wet ? Refer to the swamp soil. 2 What is the result if the soil is pure sand and theseason is dry? 3 What is the best soil for a garden? 4 At what depth do we find sand? 5 Where do we find pure loam ? 6 How did our soil become mixed? a Earthworms. 7 Effect of heat on soil? 218 THE SECOND SCHOOL YEAR Experiment:—Fill a large can with finely powderedsoil and wrap it with many thicknesses of paper. Set itin the sunshine. Test the sand and the loam with a ther-mometer in the different parts of the can, and notice theeffect of the heat on each. How will this affect the seeds?. NATURE STUDY HOW SOIL IS MADE I Breaking or rotting of rock. 1 Work of frost and water in breaking or crum- bling rock. 2 Roots pushing into cracks help break rocks. 3 Acid in water helps dissolve rock. Notice crust inside teakettle. Experiment:—Get a little MAY-NATURE STUDY 219 muriatic acid and try its effect on stones; trysandstone or granite. II Wearing off of pebbles in a running steam. Go to creek and study action of water. Tell story,Stony and Rocky (Childs World). III Leaves and vegetables make soil. 1 Leaves fall in autumn. 2 Moisture helps them to decay and turn to a field trip and see if your class can find an ex-ample of soil-making. Earthworms. Mark off a square yard of ground where the wormsare at work and closely observe them. Notice the kind of soil—clay, loam, moist or dry—thework of mixing the soil. Notice the castings in the morni
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