1 86 NATURE STUDY 



DURING SEED-GROWING time, plant seeds not before studied, such as sun- 

 flower, castor-oil bean, buckeye, walnut, acorn, almond, or any 

 other seeds brought in by the pupils for their study. Use the di- 

 rections given under the same subject for the first grade. 



ELECTIVE. 



SELECT two subjects from Elective List No. 1. 

 SELECT one subject from an outside source. 



Fourth Grade. 



PRESCRIBED. 



EVAPORATION. Liquids. Compare water, alcohol, gasoline, glycerine, mo- 

 lasses. 



Show existence of vapor by use of ether, alcohol, chloroform. 



Show that heat is used up during evaporation. 



Evaporation of solids, such as camphor and iodine. 



Condensation. 



Show sources of vapor of water by condensation from breath, surface 

 of skin, under surface of leaf, etc. 



Distill water from a flask. 



SOLUTION. Solution of various common substances that will readily dis- 

 solve in water, such as salt; those that will not dissolve readily, 

 as camphor, potassium, bichromate, copper sulphate, and the like; 

 those that do not dissolve perceptibly. such as whiting, starch, etc. 



Evaporation of water to regain substance, formation of crystals, in 

 part. 



Use of funnel and filter-paper to show dissolved substances. 



Application of these phenemena to fogs, clouds, snow, rain, formation 



of soils, erosion, etc. 



THE FUNGI GROUP, including mushrooms and the like, puff-balls, geasters, 

 moulds, lichens. Place of growth, spore surfaces, discharge of 

 spores, etc. Collect as many varieties as possible. Compare the 

 various forms studied. 



Examples of parasitic plants, such as mistletoe and dodder; their life 



history. 

 FINE TREE. (In season of casting pollen.) 



