The package esint has been updated at tug.ctan.org and the changes should soon propogate to your favorite mirror.

Thank you, Jim Hefferon

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The following information was provided by the package's contributor.

Name of contribution: esint -- addition of plain TeX macros Author's name: Michael M. Tung, Martti Nikunen Location on CTAN: /fonts/ps-type1/esint Summary description: addition of macros for using esint integral font under plain TeX License type: lppl

Announcement text given by the package's contributor: - ---------------------------------------------------------------------- Added to this package are TeX macros to use Eddie Saudrais's esint10 fonts (and their Type 1 format by Martti Nikunen) under plain TeX. A plain TeX sample and test file for the integral symbols is included. Martti graciously agreed to include this material in with his existing work. - ----------------------------------------------------------------------

You can have a look at the package at http://tug.ctan.org/tex-archive/fonts/ps-type1/esint although you may get a better network connection by visiting a mirror of CTAN that is near to you; see http://www.ctan.org/tex-archive/README.mirrors .