diff -ruN -Xcvs/diff_ignore cvs/server/citytools.c work/server/citytools.c
--- cvs/server/citytools.c      Mon Jul  3 01:30:09 2000
+++ work/server/citytools.c     Mon Jul  3 04:01:11 2000
@@ -553,9 +553,9 @@
       science_bonus+=50;
   }
   if (city_affected_by_wonder(pcity, B_COPERNICUS)) 
-    science_bonus+=50;
+    science_bonus*=1.5;
   if (city_affected_by_wonder(pcity, B_ISAAC))
-    science_bonus+=100;
+    science_bonus*=2;
   pcity->science_bonus = science_bonus;
   return science_bonus;
 }