Search results
Results from the WOW.Com Content Network
Aristotle's wheel paradox is a paradox or problem appearing in the pseudo-Aristotelian Greek work Mechanica. It states as follows: A wheel is depicted in two-dimensional space as two circles . Its larger, outer circle is tangential to a horizontal surface (e.g. a road that it rolls on), while the smaller, inner one has the same center and is ...
The Specie Circular is a United States presidential executive order issued by President Andrew Jackson on 11 July 1836 pursuant to the Coinage Act of 1834. It required payment for government land to be in gold and silver (specie). [1] It was repealed by a joint act of Congress on 21 May 1838. [2]
Social cycle theories are among the earliest social theories in sociology.Unlike the theory of social evolutionism, which views the evolution of society and human history as progressing in some new, unique direction(s), sociological cycle theory argues that events and stages of society and history generally repeat themselves in cycles.
Circular diagrams are often used in phylogenetics, especially for the graphical representation of phylogenetic relationships. Evolutionary trees often encompass numerous species that are conveniently shown on a circular tree, with images of the species shown on the periphery of a tree.
Hard money policies support a specie standard, usually gold or silver, typically implemented with representative money. In 1836, when President Andrew Jackson's veto of the recharter of the Second Bank of the United States took effect, he issued the Specie Circular, an executive order that all public lands had to be purchased with hard money.
Edward Hitchcock's fold-out paleontological chart in his 1840 Elementary Geology. Although tree-like diagrams have long been used to organise knowledge, and although branching diagrams known as claves ("keys") were omnipresent in eighteenth-century natural history, it appears that the earliest tree diagram of natural order was the 1801 "Arbre botanique" (Botanical Tree) of the French ...
The evolutionary history of species has been described as a "tree" with many branches arising from a single trunk. While Haeckel's tree is outdated, it illustrates clearly the principles that more complex and accurate modern reconstructions can obscure.
While Zhou Dunyi (1017–1073) popularized the circular diagram, [15] the introduction of "swirling" patterns first appears in the Ming period and representative of transformation. Zhao Huiqian ( 趙撝謙 , 1351–1395) was the first to introduce the "swirling" variant of the taijitu in his Liushu benyi ( 六書本義 , 1370s).