Joseph Hamilton Lambert the formerly productive trees. Lambert introduced new horticulture methods that in two years restored the health of the trees and again allowed them to produce "mammoth" crops of apples. Lambert became the sole owner of the orchards, which are notable for being the first to produce cultivated fruit in Oregon. Lambert developed what became known as the Lambert cherry, by grafting a volunteer seedling, found in 1848 under a Napoleon cherry tree to the rootstock of a May Duke cherry. The crown of the tree died in 1880 and a new tree grew from its roots that was not a
History of manifolds and varieties History of manifolds and varieties The study of manifolds combines many important areas of mathematics: it generalizes concepts such as curves and surfaces as well as ideas from linear algebra and topology. Certain special classes of manifolds also have additional algebraic structure; they may behave like groups, for instance. In that case, they are called Lie Groups. Alternatively, they may be described by polynomial equations, in which case they are called algebraic varieties, and if they additionally carry a group structure, they are called algebraic groups. The term "manifold" comes from German "Mannigfaltigkeit," by Riemann. In English, "manifold" refers to