Index: trunk/doc/tutorial/simulation/raw/04_passive_tr.html
===================================================================
--- trunk/doc/tutorial/simulation/raw/04_passive_tr.html	(revision 7924)
+++ trunk/doc/tutorial/simulation/raw/04_passive_tr.html	(revision 7925)
@@ -9,8 +9,8 @@
 
 <h2> The schematics </h2>
 <p>
-The single-sheet schematics contains the filter, the voltage source and
-spice command symbol.
+The single-sheet schematic contains the filter, the voltage source and
+the spice command symbol.
 <p>
 <a href="04_passive_tr.rs"><img src="04_passive_tr.svg" width=400px></a>
 <center>Click the image to get the sch-rnd sheet</center>
@@ -19,16 +19,16 @@
 <h2> SPICE: what a tran simulation is </h2>
 <p>
 In the tran(sient) analysis a DC solution is calculated first
-then a simulation is ran with a fixed time stepping, updating the internal
+then a simulation is run with a fixed time stepping, updating the internal
 states of components (e.g. capacitor charges) and networks (voltages). The
-result is typically a graph with time on the X axis and voltages/currents on
-to Y axis.
+result is typically a graph with time along the X axis and voltages/currents on
+the Y axis.
 
 <h2> Preparing for simulation </h2>
 
 <h3> V1 </h3>
 <p>
-In our example, V1 uses a PULSE wave form as stimulus on the <i>in</I> network.
+In our example, V1 uses a PULSE wave form as the stimulus on the <i>in</I> network.
 The SPICE syntax of PULSE is:
 <pre>
 PULSE(V1 V2 TD TR TF PW PER NP)
@@ -61,14 +61,14 @@
 The first line instructs spice to do the "transient analysis" with 0.1ms
 time stepping up to 200ms.
 The second tells it plot (draw) three voltages; our X axis is time (because
-of tran), display the plot between 0 and 200ms.
+of tran), and to display the plot between 0 and 200ms.
 
 
 <h2> Export and run ngspice </h2>
 <p>
-Because of the plot command the output is a drawing (if ngspice is ran
-on X), a graph with three curves. Fastest is v(in), a slower, curvy
-trace is mid's voltage and the slowest to follow is v(out).
+Because of the plot command the output is a drawing (if ngspice is run
+on X), consisting of a graph with three curves. Fastest is v(in), a
+slower, curvy trace is mid's voltage and the slowest to follow is v(out).
 <p>
 <img src="04_passive_tr.png">
 
@@ -83,12 +83,12 @@
 tran 0.1ms 200ms > plot.txt
 </pre>
 <p>
-This tells gnucap what to print after a tran simulation than runs the tran
+This tells gnucap what to print after a tran simulation then runs the tran
 simulation, redirecting the printout to a file called plot.txt.
 <p>
-After the export, write a single word <b>spice</b> in the first line of the
-file (e.g. using a text editor), else gnucap won't know the file is in spice
-syntax. Then run <i>gnucap 04_passive_tr.cir</i> and it will dump a text
+After the export, write the single word <b>spice</b> in the first line of the
+file (e.g. using a text editor), otherwise gnucap won't know the file is in
+spice syntax. Then run <i>gnucap 04_passive_tr.cir</i> and it will dump a text
 table to plot.txt. Run gnuplot and type the following command:
 <pre>
 plot "plot.txt" using 1:2 with lines title "v(in)", \
@@ -96,7 +96,7 @@
  "plot.txt" using 1:4 with lines title "v(out)";
 </pre>
 <p>
-The <a href="gnucap/04_passive_tr.rs">gnucap-modified schematics is also available.</a>
+The <a href="gnucap/04_passive_tr.rs">gnucap-modified schematic is also available.</a>
 
 <h3> xyce </h3>
 <p>