244 APPENDIX 



EXPERIMENT 15 



Relation of Richness and Mix of Cement Tile to Rate of 

 Flow of Water through Walls 



From the data obtained in Experiment 13, determine 

 the relation of flow of water through the walls : 



(a) Of lean dry-mix tile as against rich wet-mix tile, 



(b) Of cement tile as against common clay tile. 



EXPERIMENT 16 



The Position of Water-Table in Tiled Soils 



1. By filling or removal (by opening faucets), bring 

 the surface of water to the surface of the sand. 



2. Close all faucets and allow to stand sufficiently long 

 for the water to come to equilibrium in the sand. 



3. Measure and record height of water in water gauges. 



4. Open faucet No. 1 and permit the water to run. 



5. At the end of every five minutes, while the water is 

 flowing from faucet No. 1, measure the height of water 

 in water gauges. Ten-minute periods may be better. 

 If time permits, continue these readings until water 

 ceases to flow from faucet. There should be a student 

 for each gauge, in order that the readings for each period 

 may be made simultaneously. 



6. Plot height of water so that curves shall appear on 

 chart for each set of readings of water gauges. 



