diff --git a/README.md b/README.md
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--- a/README.md
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@@ -158,9 +158,9 @@ here's a plot of `M(mem2)` over time from the SR latch simulation. we're measuri
 ## Processing Loop (and how GPU acceleration works)
 
 the processing loop for a simulation is roughly as follows (src/driver.rs:step_until drives this loop):
-1. evaluate all stimuli at the present moment in time; these produce an "externally applied" E and B field
+1. evaluate all stimuli at the present moment in time; these produce an "externally applied" E and H field
    across the entire volume.
-2. apply the FDTD update equations to "step" the B field, and then "step" the E field (TODO: is this the right order?). these equations take the external stimulus from step 1 into account.
+2. apply the FDTD update equations to "step" the E field, and then "step" the H field. these equations take the external stimulus from step 1 into account.
 3. evaluate all the measurement functions over the current state; write these to disk.
 4. serialize the current state to disk so that we can resume from this point later if we choose.