In calculating the capacity of cisterns, 31)4 gallons are estimated to one barrel and 63 gallons to one hogshead. Circular Cistern one foot in depth.

5 feet in diam. holds.

..4 1/2 barrels.

6 feet in diam. holds.

.6 3/4 barrels.

7 feet in diam. holds.

.. 9 barrels.

8 feet in diam. holds.

..12 barrels.

9 feet in diam. holds.

. .15 barrels.

10 feet in diam. holds.

. 18 1/2 barrels.

Square Cistern one foot in depth.

5 feet by 5 feet holds.

.6 barrels.

6 feet by 6 feet holds.

..8 1/2 barrels.

7 feet by 7 feet holds.

.11 1/2 barrels.

8 feet by 8 feet holds.

.15 1/4 barrels.

9 feet by 9 feet holds.

.19 1/2 barrels.

10 feet by 10 feet holds.

.23 3/4 barrels.