61.   The upper floor has three bedrooms, all very small, because the Kaufmanns spent most of their days outside.

62.   This means that the floor will undoubtedly have to be completely sanded down, then the bleach can be applied before the floor is refinished.

63.   This would require screwing or nailing the boards again, this time with nail heads showing, something hardwood floors should not have.

64.   To see if a floor has a sealer and wax finish, apply a drop of ammonia in an inconspicuous place.

65.   To preserve its finish a floor has to be kept clean.

66.   Upper floors had to be encircled with metal bands to put a stop to further flowering.

67.   When we walked in and looked up, we were surprised to see that each floor had a big balcony.

68.   Wood floors had to be refinished twice.

69.   All the venues are finished except for the speedskating oval, whose imperfect concrete floor had to be ripped up but now is being re-poured.

70.   But the flight from Manhattan forced by the attacks offers new proof that old-fashioned trading floors have limitations, experts say.