EXPLANATION OF TERMS USED 9
sub-port, haven, creek or legal quay, or alter or vary the names,
bounds and limits thereof. . . . (Section 11.) }
The Commissioners of Customs and Excise may appoint places to
be Sufferance Wharves for the lading and unlading of goods under
such restrictions and in such manner as they shall see fit ; and may
also direct at what particular part or parts of any harbour, dock,
quay, or other place in any such ports ships Jaded with tobacco or
any particular cargo shall moor or discharge such cargo. . .
(Section 14.)
TYPICAL PORT WITH DOCK SYSTEM
The folding plan facing this page is provided in illustration
 of the general lay-out of a port in the British Isles.
It is a plan of the harbour and dock system at Leith! and
shows the arrangement of the entrance with the dredged
approach channel and the outer protecting piers, at the
extremities of which are located guiding lights for navigation.
 The harbour consists of two portions, an outer and
an inner, and the dock systems are entered from these
either by an entrance with a single pair of gates (Victoria
Dock) or by locks (Imperial Dock, Albert Dock and East
Old Dock). The inner docks (Edinburgh Dock and West
Old Dock) are connected with the outer docks by passages
across which, as also across the locks, are movable bridges
for the passage of land traffic. The student will observe
the arrangement of the quay sheds and warehouses, the dry
or graving docks, the railway sidings and connections, and
the quayside cranes.
1 For the use of this plan the author is indebted to the courtesy
of Mr. Alfred H. Roberts, M.Inst.C.E., the Superintendent and
Engineer of Leith Docks.

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