Lombe's Mill used as stores, workshops and a canteen. Hidden from the road by the power station, its existence was forgotten by the public until the power station was demolished in 1970. It was then adapted for use as Derby’s Industrial Museum, which opened on 29 November 1974. The main range was three storeys high, 42.4m by 5.5m. Each floor was used for doubling, and there were 306 doubling machines. Silk is a naturally produced fibre obtained from many species of the silk moth. In 1700 the favoured silk was produced by a moth (Bombyx mori), that spun a cocoon to protect
Crustacean larva long rostrum, and a spine on either side of the carapace; the first post-larva closely resembles the adult. Porcelain crabs have two or three larval stages, in which the rostrum and the posterior spine on the carapace are "enormously long". Hermit crabs pass through around four larval stages. The post-larva is known as the "glaucothoe", after a genus named by Henri Milne-Edwards in 1830. The glaucothoe is long in "Pagurus longicarpus", but glaucothoe larvae up to are known, and were once thought to represent animals which had failed to develop correctly. Like the preceding stages, the glaucothoe is symmetrical, and