“ The jury was instructed that it might consider whether respondent could have anticipated that a knife would be used to get out the ice cream. On this record, fair-minded men could conclude that respondent should have foreseen that petitioner might be tempted to use a knife to perform his task with dispatch, since no adequate implement was furnished him. ”

“ Pennsylvania R. Co., 350 U.S. 523, 526, 76 S.Ct. 608, 610, 100 L.Ed. 668. Since the standard of liability under the Jones Act is that established by Congress under the Federal Employers' Liability Act, 45 U.S.C.A. § 51 et seq., what we said in Rogers v. ”