Chester Rows east side of Northgate Street. Originally there were also Rows in Lower Bridge Street but these were blocked during the 17th and 18th centuries. As the ground floor buildings are usually lower than the street level, they are sometime known as "crypts". However, as the architectural historian Nikolaus Pevsner points out, this is not a strictly accurate description because the level of the floors of the buildings is a half-storey rather than a full-storey level below the street. Rows were built in the four main streets leading from Chester Cross, each of which originated during the settlement's early development. In
Whiskers The cat holds on until the prey stops wriggling." Anecdotally, it is often stated that cats use their whiskers to gauge whether an opening is wide enough for their body to pass through. This is sometimes supported by the statement that the whiskers of individual cats extend out to about the same width as the cat's body, but at least two informal reports indicate that whisker length is genetically determined and does not vary as the cat grows thinner or fatter. In the laboratory, rats are able to accurately (within 5-10%) discriminate the size of an opening, so it seems