Index: trunk/MagicSoft/include-Classes/MMcFormat/MMcEvt.hxx
===================================================================
--- trunk/MagicSoft/include-Classes/MMcFormat/MMcEvt.hxx	(revision 1591)
+++ trunk/MagicSoft/include-Classes/MMcFormat/MMcEvt.hxx	(revision 1592)
@@ -10,9 +10,9 @@
  private:
   UInt_t      fEvtNumber;
-  UShort_t     fPartId;     // Type of particle
-  Float_t      fEnergy;     // [GeV] Energy
-  Float_t      fThick0;     //
-  Float_t      fFirstTarget;  //
-  Float_t      fZFirstInteraction;  //
+  UShort_t     fPartId;             // Type of particle
+  Float_t      fEnergy;             // [GeV] Energy
+  Float_t      fThick0;             // [g/cm2]
+  Float_t      fFirstTarget;        // []
+  Float_t      fZFirstInteraction;  // [cm]
 
   Float_t fTheta;           // [rad] Theta angle of event 
@@ -35,12 +35,13 @@
 
   // 6 parameters and chi2 of the NKG fit to the longitudinal 
-  // particle distribution (see CORSIKA manual for explanation): 
+  // particle distribution. See CORSIKA manual for explanation,
+  // section 4.42 "Longitudinal shower development": 
   //
-  Float_t       fLongiNmax;
-  Float_t       fLongit0;
-  Float_t       fLongitmax;
-  Float_t       fLongia;
-  Float_t       fLongib;
-  Float_t       fLongic;
+  Float_t       fLongiNmax;   // [particles]
+  Float_t       fLongit0;     // [g/cm2]
+  Float_t       fLongitmax;   // [g/cm2]
+  Float_t       fLongia;      // [g/cm2]
+  Float_t       fLongib;      // []
+  Float_t       fLongic;      // [cm2/g]
   Float_t       fLongichi2;