1.1 --- a/org/touch.org	Mon Feb 13 23:27:24 2012 -0700
     1.2 +++ b/org/touch.org	Mon Feb 13 23:44:15 2012 -0700
     1.3 @@ -122,7 +122,7 @@
     1.4  #+end_src
     1.5  
     1.6  It is convienent to treat a =Triangle= as a vector of vectors, and a
     1.7 -=Vector2f= and =Vector3f= as vectors of floats. (->vector3f) and
     1.8 +=Vector2f= or =Vector3f= as vectors of floats. (->vector3f) and
     1.9  (->triangle) undo the operations of =(vector3f-seq)= and
    1.10  =(triangle-seq)=. If these classes implemented =Iterable= then =(seq)=
    1.11  would work on them automitacally.
    1.12 @@ -742,7 +742,7 @@
    1.13  *not* the same as touch), heat sensitivity, and our sense of balance,
    1.14  among others. One extra sense is so important that I must implement it
    1.15  to have a hope of making creatures that can gracefully control their
    1.16 -own bodies.  It is Proprioception which is the sense of the location
    1.17 +own bodies.  It is Proprioception, which is the sense of the location
    1.18  of each body part in relation to the other body parts.
    1.19  
    1.20  Close your eyes, and touch your nose with your right index finger. How