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 benefits are that it provides more degrees of freedom for sensor positioning, that it allows the animal to sample a larger volume of space with a given density of whiskers, and that it allows control over the velocity with which the whiskers contact surfaces." Animals that do not whisk, but have motile whiskers, presumably also gain some advantage from the investment in musculature. Dorothy Souza, in her book "Look What Whiskers Can Do" reports some whisker movement during prey capture (in cats, in this case): "Whiskers bend forward as the cat pounces. Teeth grasp the mouse tightly around its neck.