30.0 MB (3.4 MB compressed)
2693 x 3888 pixels
22.9 x 33.0 cm ⏐ 9.0 x 13.0 in (300dpi)
ANN RONAN PICTURE LIBRARY / HERITAGE IMAGES / SCIENCE PHOTO LIBRARY ANN RONAN PICTURE LIBRARY / HERITAGE IMAGES / SCIENCE PHOTO LIBRARY
Refrigeration: sectional view of an ice house. It consists of a pit dug and lined with brick, which is a poor conductor of heat, and roofed with thatch for the same reason. Each piece of ice would be dipped in water before being packed in the ice-house, so forming a solid mass with the minimum surface area exposed to the air.
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