typo.

www/tutorial/wireless.html

@@ -123,7 +123,7 @@ A few points should be noted:
      as long as the nodes have enough wired interfaces. If you try to
      create an experiment that uses more links (wired or wireless) on a
      node than are available in Emulab, the experiment will fail to map.
-     Of the current 28 wifi nodes, the 18 pc3000 wifi nodes 
+     Of the current 28 wifi nodes, the 18 pc3000w wifi nodes 
      (pcwf1-18) contain two wifi cards and one wired experimental interface, 
      the four pc600 nodes (pc2,9,31,40) contain one wifi card and four 
      experimental interfaces, and the four pc2Uwifi (pc180,182,183,184) 
@@ -278,7 +278,7 @@ As mentioned above, Emulab's default mapping of nodes in your virtual
 topology, to physical nodes with wireless interfaces, does not
 currently take into account physical connectivity (walls, floors,
 electrical conduits, etc. all conspire to make it possible that two
-wireless nodes 50 apart from each other will not actually be able to
+wireless nodes 50 feet apart from each other will not actually be able to
 communicate with each other). We <b>are</b> planning to add this
 capability in the future, but in the meantime it is mostly up to you
 to choose nodes that make sense for your topology. You might end up