% This macro source file is from the four volume series
% "TeX in Practice" by Stephan von Bechtolsheim, published
% 1993 by Springer-Verlag, New York.
% Copyright 1993 Stephan von Bechtolsheim.
% No warranty or liability is assumed.
% This macro may be copied freely if no fees other than
% media cost or shipping charges are charged and as long
% as this copyright and the following source code itself
% is not changed. Please see the series for further information.
%
% Version: 1.0
% Date: May 1, 1993
%
%
% This source code is documented in 8.1.3, p. I-264.
% Original source in file "vboxes2.TEX", starting line 193.
\wlog{L: "nathd.tip" ["vboxes2.TEX," l. 193, p. I-264]}%
% This file DOES belong to format "texip."
\catcode`\@ = 11
\newbox\@NBox
\def\NaturalHeight #1#2{% 
    \setbox\@NBox = \vbox{\unvcopy #2}
    #1 = \ht\@NBox
}
\def\NaturalDepth #1#2{% 
    \setbox\@NBox = \vbox{\unvcopy #2}
    #1 = \dp\@NBox
}
\catcode`\@ = 12