1-158-687 - Oxford Science Archive/Heritage Images

Gardening, 1871. In the foreground gardeners are pruning (left) and staking a potted plant (right). In the background a third man is adjusting the cover of a cold frame. The cover had a dual purpose as it could be used to exclude light when a crop was being blanched, or to act as insulation in cold weather. From the Saxon State and University Library.