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THE ACTIVITY OF VEGETABLES PAGE Plants which move--Sensitive Plant--A tourist from Neptune--The World's and the British harvest--Working of green leaves--Power of sunshine--Work done by an acre of plants--Coltsfoot, dandelion, pansies, in sunshine and in cold--Woodsorrel and crocus--Foxglove--Leaves and light--Adventures of a carbon atom--The sap--Cabbages and oaks requiring water--Traveller's tree--The water in trees--An oasis in Greece--The associate life of its trees and flowers 13