--- ray/doc/ray.html	2006/10/17 21:52:43	1.7
+++ ray/doc/ray.html	2010/03/12 18:34:43	1.8
@@ -659,7 +659,7 @@ a perfectly scattering medium (no absorption).
 The scattering eccentricity parameter will likewise override the global
 setting if it is present.
 Scattering eccentricity indicates how much scattered light favors the
-forward direction, as fit by the Heyney-Greenstein function:
+forward direction, as fit by the Henyey-Greenstein function:
 
 <pre>
 	P(theta) = (1 - g*g) / (1 + g*g - 2*g*cos(theta))^1.5