LABORATORY PRACTICE 243 



EXPERIMENT 13 



The Capacity of Tile of Different Sizes and Material to 

 Remove Water by Percolation through the Tile Walls 



1. Introduce water into the tank till the surface stands 

 1 inch deep over the sand, and allow to stand some hours 

 (unless the sand be already saturated to some inches 

 above the level of the tile). 



2. Place vessels under faucets. 



3. Open faucets and permit water to flow till flow be- 

 comes constant for each faucet. 



4. Place an empty vessel under each faucet and record 

 time. 



5. After an hour (more or less, as the rate of flow may 

 require), close faucets or remove vessels. If the vessels 

 are placed in position and removed in the same order, the 

 time of the series will be sufficiently close. 



6. By weighing or measuring, determine the amount of 

 flow for each tile. 



7. Compute flow to the acre for each size of tile, 

 assuming the tile drains to be placed 4 rods apart. 



EXPERIMENT 14 



The Relation of Diameter of Tile to Rate of Flow of Water 

 through Walls 



With data obtained in Experiment 13, determine 

 whether there is a relation between the diameter of tile 

 and the rate of flow through its walls. This experiment 

 assumes that two or more sizes of the same make of tile 

 are used in the apparatus. 



