51.   Since the incubation time in animals is so lengthy, meat from animals that do not have visible signs of infection has been getting into the human food chain.

52.   Some parents assume sexual predators or physical abusers will have telltale signs, like shifty eyes or disheveled clothing.

53.   Southern New England Telephone and Nynex both have signs, as do MassMutual and MassWest, two insurance companies.

54.   Some doors have signs warning of booby traps.

55.   Still, economists have had few signs that booming export growth is feeding faster domestic growth.

56.   That is her freedom, and inevitably her great loss, though we have no sign she will ever even recognize it as such.

57.   Tainer contends the Fed already has enough signs of faster growth and a tightening labor market to press it into lifting interest rates.

58.   The entrance to the polls still had a sign indicating it was the location for receiving farm subsidy checks.

59.   The evidence is visible even along the street outside where each of the fast-food restaurants has signs imploring job applicants to stop by.

60.   The Cortland Street stop now has a sign reminding conductors and motormen not to stop at the station.