Table A-1. Data and notes for experiments with the O.SS-miHimeter sand (r = 52.39) .-Continued. 



Expt. No. 



N 



(cm) 



T,T. 

 (s) 



(cm) 



■ X 

 (cm) 



n 

 (cm) 



(cm/s) 



♦ .♦c 



Duration 

 (hr:min) 



Brass crests mounted at ends of sand bed atop the curved ramps 











33 



30 



13.7 



2.69 





19.2 



3.42 



32.1 



11.33 



1:12 



34 



30 



13.7 



2.07 





18.6 



3.06 



41.7 



19.13 



1:11 



35 



30 



13.7 



2.71 





19.1 



3.45 



31.8 



11.16 



1:24 



36 



30 



13.7 



3.58 





19.2 



3.64 



24.1 



6.40 



1:07 



37 



60 



27.5 



5.00 





31.8 



6.83 



34.5 



13.12 



2:37 



38 



63 



28.8 



5.25 





31.8 



6.81 



34.5 



13.12 



0:45 



39 



57 



26.1 



4.75 





31.8 



6.81 



34.5 



13.12 



0:50 



40 



54 



24.7 



4.50 





31.8 



6.44 



34.5 



13.12 



0:35 



41 



51 



23.3 



4.25 





31.8 



6.08 



34.5 



13.11 



0:44 



42 



48 



22.0 



4.01 





31.8 



5.25 



34.4 



13.05 



0:38 



43 



45 



20.6 



3.74 





31.8 



4.50 



34.6 



13.18 



0:49 



44 



42 



19.2 



3.50 





31.8 



3.98 



34.5 



13.12 



0:47 



45 



52 



23.8 



4.33 





31.8 



5.69 



34.5 



13.15 



0:15 



46 



60 



27.5 



4.97 





31.8 



6.92 



34.7 



13.28 



1:29 



47 



52 



23.8 



4.32 





31.8 



6.30 



34.6 



13.21 



0:il 



48 



26 



11.9 



2.26 





16.9 



2.83 



33. L 



12.06 



0.35 



49 



52 



23.8 



4.33 





25.4 



5.50 



34.5 



13.15 



"ff:34 



SO 



60 



27.5 



4.99 





31.8 



6.83 



34.6 



13.18 



1:13 



Brass crests removed | 



51' 



40 



18.3 



3.42 

 3.58CC) 



7.3 



27.3 



4.13 



33.6 

 32.1(c) 



12.46 

 11.37(c) 



3:30 



Surface leveled and compressed 1.5 mm 



521 



60 



27.5 



4.34(c) 



8.5 



33.6 



6.56 



39.8(c) 



17.41(c) 



s,„ 



Sand in one spool reduced and redistributed 



53 1 60 1 27.5 1 4.35 

 Sand redistribution has small effect 





33.6 



6.62 



39.7 



17.33 



5:02 



Surface leveled and compressed 0.83 mm 



54 1 



60 



27.5 



4.62(c) 



9.2 



33.6 



6.61 



37.4(c) 



15.37 



3:38 



55 



T reduced 



60 

 in steps 



27.5 

 from 4.61 • 



2.24 

 to 2.24 3 





26.2 



4.53 



77.0 



65.38 



1:00 



56 



30 



13.7 



2.63 





22.9 



3.41 



32.8 



11.85 



2:31 



571 

 Experlmer 



30 

 t interruj 



13.7 

 >ted and sar 



2.78 

 2.81(c) 



d added to s 



8.7 

 pools 



20.8 



3.40 



31.0 

 30.7(c) 



10.61 

 10.39(c) 



S:12 



'Experiments with bed initially leveled. 



89 



