Slotted arrangement of bolt holes allows the planks to assume a con- 

 siderable angle with the horizontal in the vertical plane. Advantages 

 of these groins are cheapness, rapidity of construction, and facility 

 of adjustment. 



Key Words - Low/Tiraber/Du-Plat-Taylor/Structural-design/lmpermeable/ 

 Adjustable/ 



"Art of Forming Protective Beaches" 

 Wood, S. M. , U. S. Patent Office, Patent 

 No. 1,928,473, Sept., 1933, 3 pp. 



3309GR001 



This patent presents a permeable stone groin design by S. M. Wood. 



Key Words - Structural-design/Great Lakes/System/Rubble-mound/Concrete/ 

 Permeable/ Impermeable/Scour/Accretion/Patent/ 



"Groynes" 



Matthews, E. R. , Coast Erosion and Protection , 

 3rd ed. , Charles Griffin and Co., Ltd., 

 London, 1934, 228 pp. (TC330 .M43) 



3400GR0001 



Two chapters in this text deal with groins. Efficiency and cost 

 of different groin designs as compared to that of Case-groins are 

 given with reference to specific construction projects on the coast of 

 Great Britain. The author gives a three-part presentation dealing with 

 (1) high timber groins, (2) low timber groins, (3) concrete-block 

 groins . 



Key Words - Concrete/Timber/Misc-materials/Field/High/Low/Long/ 

 Structural-design/Case/System/ 1900- 1949 /Economics/ 

 Pi ling/Short /Impermeable/Europe/ 



"Wrightsville Beach, N. C." 



U. S. Army, Corps of Engineers, House Document 



No. 218, 73d Congress, 2d Session, Jan., 1934. 



Key Words - House Document/Not Annotated/ 



3401GR0001 



