Showing papers in "Research Papers in Economics in 1949"

Flow of Water in Channels Protected by Vegetative Linings

Abstract: By W. O. REE, associate h'Ycll'(uLiic e1![lincel', and V, J, PALMEH,l associate.. (t{lrimtlho'al e~liui1t(jc)', Di'vision of Dmi1wuc ami WeLtcl' Cont'I'ol, Research, Soil COW.lCl'V(Lt-ion Service. CONTENTS Puge Pnge rntraduction ""","','".," 2 Kudzu experiments '........... 52 Expel'imental conditions and Record of experiments "..... 57 pl'ocedul'e ,.,",.," •. , , . , 3 Hydraulic behavior of kudzu.. 62 Constructing and preparing Stability of a channel lined channels •.. " .. ,' ..... ,. 4 with kudzu." .... , ... ,. 63 'resting "", .... " ..... , .. " 5 Effect of plowing a kudzu-lined Measul'l)ments and obs.:;:vations 7 channel .. , ... ,", .. " ' .. 64 Methods oJ computation and estiCommon lespedeza experiments, . 65 mate", ..... , ' ..... , ... , 10 Record of expr·riments ... ,.' 68 Hyeil'liulic computations ,.,',. 10 Hydl'llulic behaviol' of common Seoul' computations ... , ... ,'. 13 lespedeza ... ,'., .... , .. 73 Estimating permissible veloci­ 1;5 Stability of a channel lined ties .... ,' .. ,.,.".,',', 13 with common lespedeza. '. 76 Retlll'dance of flow , ...... , ... . 13 Sericea lespedeza experiments. ,. 76 rnfluence of a vegetal lining .. . Influence of bed slope. ... ,., 15 Record of experiments ..... , 77 Influence of type lind condition Hydraulic behavior of sericea of vegetlltion 18 lespedeza .... , ..•.... , .. 84 Effect of cutting vegetation 18 Stability of a channel lined Influence of ohape of channel .. 18 with sericea lespedeza, ... 87 Influence of order of test flows 19 Sudan grass experIment ,.".,. 89 VR as an index of l'etardance .•. ~~ RecOl'd of experiment , ...... . 89 Bermuda grass experiments 24 Hydraulic behavior of Sudan Record of experiments • grass "' ...... ,.,.,.". 91 Hydraulic behavior of Bermuda Stability of a channel lined grass ......... ~, ... , .. , 40 with Sudan grass .. , .... . 91 Stability of a channel lined with 41 Grass mixture experiments .... . 91 Bermuda grass .... , .. , , Oentipede grass experiments ". 44 Record of experiments .. , ... . 94 Record of expel'iments 44 Hydl'Uulic behavior of grass Hydraulic behavior of centi ­ mixture ..... , .... , ... ,. 97 pede grass" .. , ... " .. ,. 48 Stability of a channel lined Stability of a channel lined with grass mixture 99 with centipede gl'ass 48 Bare-channel experiments .... ,. 99 Dallis grass-crabgrass experiRecol'd of experiments .. , .. , 99 ment ... ,',., ..... , .. , .. ' 49 of on bare Discussion results Record of experiment. . . . . . .. 49 channels , .. , .... , .. , .... 101 Hydraulic behavior of Dallis 52 Field application of results .. ,. 101 grass and crabgl'ass Retal'dance coefficients " .... , 101. Stability of a channel lined

A Concise Economic History of Britain

Abstract: Economic history is the story of man's work, particularly in agriculture trade, and manufacture. This book presents a panorama of work in Britain, as it increases in skill and complexity, through the ages that separate hunters of the prehistoric forests from the first beginnings of a modern highly organized industrial state.