Grade. 

 Date. . 



(44) 



EXERCISE 16 



Capillary Rise of Water in Soils of Different Texture 

 Purpose. — To determine the influence of the fineness of a soil upon tlie 

 speed and total rise of capillary water. 



plan 

 1 . Close the ends of the large glass tubes (Fig. 1 1) by mcvans of pieces of muslin 

 firmly tied on. 



Fig. 10. — Handy equipment to show 

 cf water by capillarity. 



I'lG. 11. — Frame and glass tubes for showing capil- 

 lary rise of water in different soils. 



12. — Galvanized tray or tank to be used with the support for tubes i 

 Also useful for exercise Xc 17 



showing capillary rise of water. 



2. Hold the tubes in a vertical position and carefully fill with their respective 



soils. After filling compact the soil by allowing the tubes to drop from 

 a distance of four inches four times upon a book. 



3. Place the tubes in a supporting frame (Fig. 11) over a rectangular pan of 



water, so that the ends are about one-half inch below the surface of the 

 water (Fig. 12). 

 This experiment may be set up by the instructor but each student must fill 

 out the following observation blank for himself as nearly at the time 

 indicated as possible. 



