SHAPE.
21
be cited from Avonmouth, Cardiff (Roath Dock), and London (West India
Dock, fig. 16).
The lozenge, or diamond, is a slight deformation of the square, resulting
in an improvement of form when the entranee is at one of the acute angles,
as is the case in the most noteworthy instance of its use—viz., at the
Empress Dock, Southampton (fig. 1).
Ihe mac/iieolated form consists of any rectilinear outline in conjunction
with a number of internai projections, often of the nature of jetties or
staiths. It constitutes an admirable means of utilising large docks to their
fullest extent, as will be evident from an inspection of the plans of the
Alexandra Dock at Hull (fig. 12), the Victoria Dock at London (fig. 17),
Penarth Dock, and others.
Fig. 1.—Southampton Docks. Scale, jjE.
A paiticulai variation, or possibly an evolution, of the previous type is
the tridentine, in which a main dock is provided with three important
or branches, perpendicular to it. Such is the shape adopted for the
Hbury Docks at London (fig. 9), the Alexandra and Huskisson Docks at
iverpool (fig. 5), and the Prince’s Dock at Glasgow (fig. 10). There is no
essential limit to the number of branches, but three appears to be a very
terI-Ceable number consistent with compactness of design. For reasons of
c, tlie bianches should be arranged to the landward of the main dock.
Finally, we corne to yet another evolution of the machicolated, which,
om its resemblance to the outspread fingers of a hand, may appropriately