typo fixed, thanks Michael

1 files changed, 7 insertions, 1 deletions

diff --git a/emratio.tex b/emratio.tex
index 4a45931..42d6630 100644
--- a/emratio.tex
+++ b/emratio.tex
@@ -235,7 +235,13 @@ $\sigma_m$}.
 
 \section*{Appendix: Helmholtz coils}
 
-The term Helmholtz coils refers to a device for producing a region of nearly uniform magnetic field. It is named in honor of the German physicist Hermann von Helmholtz. A Helmholtz pair consists of two identical coils with electrical current running in the same direction that are placed symmetrically  along a common axis, and separated by a distance equal to the radius of the coil $a$. The magnetic field in the central region may be calculated using the Bio-Savart law:
+The term Helmholtz coils refers to a device for producing a region of
+nearly uniform magnetic field. It is named in honor of the German physicist
+Hermann von Helmholtz. A Helmholtz pair consists of two identical coils
+with electrical current running in the same direction that are placed
+symmetrically  along a common axis, and separated by a distance equal to
+the radius of the coil $a$. The magnetic field in the central region may be
+calculated using the Biot-Savart law:
 \begin{equation}\label{emeq_apx}
 B_0=\frac{\mu_0Ia^2}{(a^2+(a/2)^2)^{3/2}},
 \end{equation}