feet diameter, 40 feet deep;
outer lift, 200 feet diameter, 40 feet deep. The diameter over all is about
230 feet. The impression produced upon the members of the Austrian Society
by their visit to Erdberg was altogether most favorable; and not only did
the inspection of the large gasholder justify every expectation, but the
visitors were convinced that all the buildings were in excellent condition
and well adapted for their purpose, that the machinery was of the latest
and most approved type, and that the management was in experienced hands.

THE NEW GASHOLDER

is contained in a building consisting of a circular wall covered with a
wrought iron roof. The holder itself is telescopic, and is capable of
holding 31/2 million cubic feet of gas. The accompanying illustrations (Figs.
1 and 3) are a sectional elevation of the holder and its house and a
sectional plan of the roof and holder crown. Having a capacity of close
upon 3,200,000 Austrian cubic feet, this gasholder is the largest of its
kind on the Continent, and is surpassed in size by only a few in England
and America. By way of comparison, Hamburg possesses a holder of 50,000
cubic meters (1,765,000 cubic feet) capacity; and there is one in Berlin
which is expected to hold 75,000 cubic meters (2,647,500 cubic feet) of
gas.

GASHOLDER HOUSE.

The gasholder house at Erdberg is perfectly circular, and has an internal
diameter of 63.410 meters. It is constructed, in three stories, with forty
piers projecting on the outside, and with four rows of windows between the
piers--one in each of the top and bottom stories, and two rows in the
middle. These windows have a height of 1.40 meters in the lowest circle,
where the wall is 1.40 meters thick, and of 2.90 meters in the two top
stories, where it is respectively 1.11 meters and 0.90 meter thick. The top
edge of the wall is 35.35 meters above the base of the building, and 44.39
meters from the bottom of the tank; the piers rising 1.60 meters beyond the
top of the wall. The highest point of the lantern on the roof will thus be
48.95 meters above the ground.

GASHOLDER TANK.

The tank in which the gasholder floats has an internal diameter of 61.57
meters, and therefore a superficial area of 3,000 square meters; and since
the coping is 12.31 meters above the floor, it follows that the tank is
capable of holding 35,500 cubic meters (7,800,000 gallons) of water. The
bottom consists of brickwork 1.10 meters thick, ren