diff --git a/docs/seven-wonders.pdf b/docs/seven-wonders.pdf
index e4082a3..119e236 100644
Binary files a/docs/seven-wonders.pdf and b/docs/seven-wonders.pdf differ
diff --git a/images/cablemix.jpg b/images/cablemix.jpg
index d7abe80..6d0605b 100644
Binary files a/images/cablemix.jpg and b/images/cablemix.jpg differ
diff --git a/images/cablepressure.jpg b/images/cablepressure.jpg
index f2594e8..61a524c 100644
Binary files a/images/cablepressure.jpg and b/images/cablepressure.jpg differ
diff --git a/images/cableshear.jpg b/images/cableshear.jpg
index d508029..a87401e 100644
Binary files a/images/cableshear.jpg and b/images/cableshear.jpg differ
diff --git a/images/cabletension.jpg b/images/cabletension.jpg
index 4118e9b..535d421 100644
Binary files a/images/cabletension.jpg and b/images/cabletension.jpg differ
diff --git a/images/drawings.odp b/images/drawings.odp
index 5caeaa0..bf7ea99 100644
Binary files a/images/drawings.odp and b/images/drawings.odp differ
diff --git a/seven-wonders.pdf b/seven-wonders.pdf
index e4082a3..119e236 100644
Binary files a/seven-wonders.pdf and b/seven-wonders.pdf differ
diff --git a/seven-wonders.tex b/seven-wonders.tex
index 22dc8cf..77ff67d 100644
--- a/seven-wonders.tex
+++ b/seven-wonders.tex
@@ -2,7 +2,7 @@
 \pdfinclusioncopyfonts=1
 %% Author: PGL  Porta Mana
 %% Created: 2015-05-01T20:53:34+0200
-%% Last-Updated: 2024-10-31T11:50:37+0100
+%% Last-Updated: 2024-10-31T12:19:57+0100
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 \newif\ifanon
 \anonfalse
@@ -5483,9 +5483,13 @@ \section{Formulation and generalities}
 
   \begin{equation}
     \label{eq:cons_matter}
-      \underbracket[0pt]{\yN(\ytf) =\yN(\yti) + \int_{\yti}^{\ytf}\!\!\yJ(t)\,\di t  \int_{\yti}^{\ytf}\!\!\ya(t)\,\di t}_{\mathclap{\text{\color{grey}integral form}}}
+    \underbracket[0pt]{\yN(\ytf) =
+      \yN(\yti) +
+      \int_{\yti}^{\ytf}\!\!\yJ(t)\,\di t  +
+      \int_{\yti}^{\ytf}\!\!\ya(t)\,\di t}_{\mathclap{\text{\color{grey}integral form}}}
       \qquad\quad
-      \underbracket[0pt]{\frac{\di\yN(t)}{\di t} = \yJ(t)  \ya(t)}_{\mathclap{\text{\color{grey}differential form}}}
+      \underbracket[0pt]{\frac{\di\yN(t)}{\di t} = \yJ(t) +
+        \ya(t)}_{\mathclap{\text{\color{grey}differential form}}}
   \end{equation}
   The supply $\ya$ is usually called \textbf{activity}, and $\ya(t)\equiv 0$ in case of conservation.
 \end{definition}
@@ -6436,7 +6440,7 @@ \subsection{Statics again: cable cars}
 \begin{definition}{{Momentum flux allowed in cables and ropes}}
   A cable, rope, or similar object can (approximately) only transmit \autoref{sec:tension}{\emph{tensile} momentum flux}, aligned along its axis.
 \end{definition}
-Pictorially this means that only the momentum flux represented in the left picture below (tension) is physically possible:
+Pictorially this means that only the momentum flux represented in the left picture below -- tension -- is physically possible:
 \begin{center}
 \includegraphics[align=c,width=0.33\linewidth]{images/cabletension.jpg}%
 \hfill