INDEX. 



" Page. 



Accents, notation by 96 



Acknowledgments 9 



Adjustment of observations 55-95 



Airy, Wilfred, on the law of stream traction 16,162 



Alluvium, natural, capacity for 177-178 



Antiduues, formation and movement of 31-34, 243 



Apparatus, descriptions and figures of 1, 19, 257 



Arntzen, "\VaIdemar, work of 9 



B. 



Bazalgette, J. W., on flushing sewers 216 



Bed , changes in roughness of, effect of, on velocity 246 



characl er of, effect of, on flume traction 206 



nature of, in streams and in flumes 15 



of dcljris, diagrammatic longitudinal section of 57 



profiles of 58 



stream, composed of debris grains, ideal profile of 155 



contoured plot of 198 



Berlin, laboratory of river engineering at 16 



Blackwell, T. E., observations by, on velocity competent for flume 



traction 216 



Blasius, H., on deposits resembling dunes 232 



on rjiythmic features of river beds foot note, 31 



Blue, F. K., experiments by, on flume traction 217-218 



Briggs, Lyman J., acknowledgments to 9 



and Campbell, Arthur, work of, on viscosity as affected by 



suspended matter 228 



Brigham, Eugene C., and Durham, T. C., work of, on viscosity as 



affected by suspended matter 228 



Burgess, J. A., work of 9 



C. 



Campbell, Arthur, and Briggs, L. J., work of, on viscosity as 



affected by suspended matter 228 



Capacity, definition of 10, 35 



for flume traction, in a semicylindric trough 214 



in relation to discharge 209 



in relation to fineness 210 



in relation to slope 208 



of mixed grades 212 



table of adjusted values of 204-206 



in relation to form ratio 213 



lor stream traction, in relation to depth 164-168 



in relation to discharge 137-149, 233-235 



in relation to fineness 150-154, 235 



in relation to form ratio 124-136, 236 



in relation to slope 96-120, 233 



in relation to velocity 155-163, 193-195 



maximum 124, 130 



of a natural alluvium 177, 180 



of mixed grades 113-115,169-185 



review of controls of, by conditions 186-193 



table of values of, adjusted in relation to slope 75-87 



readjusted in relation to discharge 137-138 



readjusted in relation to fineness 151 



for suspension 223-230 



Channels, crooked, experiments with 196-198 



curved, features of 198,220-221 



form of 10 



of fixed wjdth, relation of capacity to slope in 96-116 



of similar section, relation of capacity to slope in 116-120 



shaping of, by natural streams 221,222 



widths of 22 



See also Bed and Form ratio. 



Christy, S. B. , acknowledgments to 9 



Competence, definition of 35 



influm traction, data bearing on _ 215-216 



simultaneous, for all controls of capacity 187 



Competence constants, use of term 187 



Computation sheet, logarithmic, figure showing 95 



Contraction , local, eflect of, on velocity 245 



Contractor, influence of 57 



outfall, description of 25 



Controls of capacity, review of. 186-195 



Cornish, Vaughan, on antidunes footnote, 32 



on progressive waves in rivers 244 



Cunningham, Allan, on the velocities of streams 155 



Current, nature of, at bends in channels. . . : 198, 220-221 



See also Velocity. 



D. 



Darcy, H., and Bazin, F. A., modification of Pitot-Darcy gage by. 262 



formulas of, for velocities in conduits and rivers 193-194 



Deacon, G. F., experiments by 16 



Di'-bris, collective movement of. 30-34 



grades of, tables of 21, 199 



mixed , causes of superior mobility of 178-179 



mixtures of grades of, evidence from experiments with 113-1 15 



experiments with 1 69-185 



table of observations with 52-54 



movement of particles of 155-156 



natural, capacity for traction of. 177-178 



table of observations with 54 



source and sizes of 21-22, 152 



table of observations with , 36-54 



used in experiments, plate showing 22 



See also Fineness and Sand. 



Depth of water, adjusted values of, table of. 89-93 



adjustment of observations on 87-95 



gage for measuring 21 



in relation to slope, plot of observations on 87 



in unloaded streams in flumes, table of 213 



method of measuring 25-26 



observations on, table of. 38-54 



relation of capacity to 164-168 



relation of velocity to, ideal curves showing 161 



table of values of, for debris of grade (C) , when the width is 0.66 



loot and the slope is 1.0 per cent 128 



variation of, as related to variation of d ischarge 165 



Dimensions of coefficients 64, 129, 139, 151, 186, 191 



Discharge, change of, effect of, on velocity 246 



competent, table of experimental data on 70 



constant, relation of capacity to depth under 164 



relation of capacity to velocity under 157 



control of constants by 132-133 



definition of. 35 



diversity of, rn natural streams 221-222 



gate for measuring, description and rating of 257-259 



measurement of 22-23 



mode of controlling 20 



relation of , to 66-67 



relation of capacity to 137-149 



values of, corresponding to gate readings 23 



variation of, in relation to variation of depth 165 



Discharge factor, applicability of, to natural streams 2)3-235 



influence of 10 



Dresden, laboratory of river engineering at 16 



Dubuat-Nancay, L. G., experiments of, on competent velocity. 193,216 



Dunes, definition of 31 



formation and movement of 31, 231-232 



longitudinal section illustrating 31 



In relation to rhythm of current 242,244 



interval between, length of 243 



Dupuit, theory of, on suspension footnote, 224 



Durham, T. C., and Brigham, Eugene C., work of, on viscosity as 



affected by suspended matter 228 



Duty, constant for similar streams 239 



definition of 36, 74 



general formulation of 192 



In experiments of F. K. Blue 217 



in relation to discharge 144, 147 



in relation to fineness 154 



in relation to slope - 121 



values of, corresponding to adjusted values of capacity, table of. 75-87 



261 



