3625 



3650 



3675 



3700 







— x 



— x 



10 



20 



5 ft/hr. 



25 30min. 



n 



h 



x — Connection 



20 15 10 5 ft/hr. 



5 SO I5min. 



3640 



3650 



3660 



3670 



3680 



3690 



3700 



3710 



Figure 18-3. Curves plotted from same data as those of Figure 18-2. Solid line represents 

 a plotted five-foot interval. Dotted line reflects an average plot. 



— x ^■^*"^" 



