Knight's American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary ; and digest of mechanical appliances in science and the arts . lar form, a very com-mon construction ofthe jetty is a timberframing A, secured bypiles or loaded witlirubble. It is oftenbuilt in the manner ofa sea-wall ; having adouble row of sheeting]>iles, the interval filledin with rubble or be-ton. The latter is ex-cellent. The tfrm jettyis also a]iplied to ex-pensive andsolid erec-tions of ma/-sonry, and toAnnisorlan
Knight's American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary ; and digest of mechanical appliances in science and the arts . lar form, a very com-mon construction ofthe jetty is a timberframing A, secured bypiles or loaded witlirubble. It is oftenbuilt in the manner ofa sea-wall ; having adouble row of sheeting]>iles, the interval filledin with rubble or be-ton. The latter is ex-cellent. The tfrm jettyis also a]iplied to ex-pensive andsolid erec-tions of ma/-sonry, and toAnnisorland-ing-places forboats. Tetordsjetty B at theeastern arm. JEWEL. 1213 JEWS-HARP. of Kingstown Harbor, Ireland, is an example of ajetty made of rubble, with a traek and parapet ofcoursed masonry. The foreshore, in most works ofthis kind, is faced with pitched stones, that is, anouter layer in which the undressed stones are notlaid at random, but depositeil end on, beginning atthe lower edge, and so caused to bind and becomemutually sustaining. Jetties of masonry (C) hare usually ashlar facinf/sand luartinys of rubble or concrete. The walls filledin with lieton will be nearly eipial to a solid mass ;in fact, biiton itself makes a wall of such tenacitythat its strength is equal to a homogeneous the ashlar masonry is filled in with eartli itretiuires a bond ; when this is of masonry, the coun-terforts take the form of division-walls, wdiich the jetty to a series of coinpartnicnts. Thestones of th?se horizoatal bonding courses should becramped and joggled together, and the top carefullypaved to prevent infiltration. The sou
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