posed
seemed to meet all the requirements of the case, and a group of
ten structures was erected. The trial that was made of these proved
entirely satisfactory. The city then made concession to the Neuilly
company, for six years, of the market in Boulevard Richard-Lenoir,
of those of La Reine Park, and of the Madeleine flower markets. A six
months' trial has shown the great resistance of the materials that we
are about to describe in detail.

The structure is supported by cylindrical hollow iron uprights that
are firmly connected with the ground as follows: At the places where
they are to be fixed, small catches are inserted in the ground so that
their upper surface comes flush therewith. These catches consist of
two cast iron sides bolted together, and of a bottom and ends formed
of flat iron--the end pieces being bent so as to form cramp irons.
Each of the sides is provided internally with a projecting piece, and
an inclined plane as a wedge. In case the catch becomes filled with
dirt, it can be easily cleaned out with a scraper. The iron upright
terminates in a malleable cast iron shoe, which is screwed on to
it, and which is provided beneath with a projection in the form of
a reversed T, the upper part of the horizontal branches of which is
beveled off in a direction opposite that of the inclined planes of the
catch. This projection enters through the slit and fits into the two
wedges, and a simple blow of a hammer suffices to make the adherence
perfect.

The front and hind uprights differ only in length, and the roof
timbers are joined at their upper extremities. The figures so well
show how the parts are fitted together as to render an explanation
unnecessary.

The dimensions of these structures vary from 6.5 to 5.75 feet in
length by 6.5 in width and 6 in height. The rafters are prolonged so
as to project 4.25 feet in front, in order to form a protection for
the purchaser. This part of the rafters, as well as the longitudinals,
is supported by three curved iron braces, which are put in place as
follows: The timbers are provided with a ring fixed by a screw, and
one extremity of the brace is inserted into this, while the other is
held against the upright by a sliding iron socket. The longitudinal
timbers are supported between each two uprights by an iron rod that
rests upon a block of stone fixed in the ground.

The front ends of the rafters are connected by a longitudinal, 18 feet
in length.

The structur