APPENDIX 



225 



water, rubber bands, cloth, sand, loam, clay. Lamp chimneys may 

 be used in place of glass tubes. 



Directions, (a) Fasten the two glass plates together by a rubber 

 band. Put a thin splint between the plates at one side and set in 

 water. Note the varying height to which the water rises between 

 the plates, and why. Make illustrative drawing. 



(b) Put a piece of cloth over the end of each tube and fasten 

 with a rubber band. Fill each with one of the soils, set in a pan of 

 water, and note in which the water rises the most rapidly. Record 

 results as follows : 



HEIGHT OF WATER 



Continue this for about a week. Note in which the water rises 

 highest, and why. Compare the rise indicated with that of oil in a 

 lamp wick, ink in a blotter, etc. 



What is the object of compacting the soil over seeds when 

 planted ? 



IV. EVAPORATION FROM THE SOIL 



Materials. Spring balance, three tin cans with holes in the side, 

 string for a bail, soil, fine grass. 



Directions. Nearly fill each can with soil, adding equal amounts 

 of water to each. Leave the surface of one can undisturbed. As 

 soon as the surface of the second is dry enough, stir it to a depth 

 of about one inch, and keep it stirred. Cover the top of the third 

 with grass, and weigh. Weigh each can, with the contents, each 

 school day for about two weeks, tabulating the results at the end. 



