
    Susan Rupp, an Infant, by Jane Rupp, Her Guardian ad Litem, et al., Respondents, v. New York City Transit Authority, Defendant, and City of New York, Appellant. City of New York, Third-Party Plaintiff-Respondent, v. Marcam Construction Co., Third-Party Defendant-Appellant.
   Beldock, Acting P. J., Kleinfeld, Christ, Pette and Brennan, JJ., concur.  