Penny-farthing the trend was short-lived, the penny-farthing became a symbol of the late Victorian era. Its popularity also coincided with the birth of cycling as a sport. Eugène Meyer of Paris, France is now regarded as the father of the high bicycle by the International Cycling History Conference in place of James Starley. Meyer patented a wire-spoke tension wheel with individually adjustable spokes in 1869. They were called "spider" wheels in Britain when introduced there. Meyer produced a classic high bicycle design during the 1880s. James Starley in Coventry added the tangent spokes and the mounting step to his famous bicycle
Mode of a linear field Mode of a linear field In physics, a vector field is linear if it is a solution of a set of linear equations "E". For instance, in physics, the electromagnetic field in vacuum, defined in the usual (3 + 1)-dimensional space "S", obeys Maxwell's equations. A linear combination of electromagnetic fields, with constant, real coefficients, is a new field which obeys Maxwell's equations. The solutions of the linear equations are represented in a real vector space "M". A radius of "M", which represents proportional solutions, is called a "mode". A norm may be defined. For instance, in electromagnetism, it is