diff --git a/src/com/builtbroken/common/Pair.java b/src/com/builtbroken/common/Pair.java
index 73423d0b..00678d12 100644
--- a/src/com/builtbroken/common/Pair.java
+++ b/src/com/builtbroken/common/Pair.java
@@ -1,5 +1,8 @@
 package com.builtbroken.common;
 
+/** Container for two objects
+ *
+ * @author Robert Seifert */
 public class Pair<L, R>
 {
     private final L left;
diff --git a/src/com/builtbroken/common/TextHelper.java b/src/com/builtbroken/common/lang/TextHelper.java
similarity index 98%
rename from src/com/builtbroken/common/TextHelper.java
rename to src/com/builtbroken/common/lang/TextHelper.java
index 0fed603d..78b6885a 100644
--- a/src/com/builtbroken/common/TextHelper.java
+++ b/src/com/builtbroken/common/lang/TextHelper.java
@@ -1,4 +1,4 @@
-package com.builtbroken.common;
+package com.builtbroken.common.lang;
 
 import java.awt.Color;
 
diff --git a/src/com/builtbroken/common/science/units/ElectricUnit.java b/src/com/builtbroken/common/science/units/ElectricUnit.java
index 95d35ffd..2c6282d0 100644
--- a/src/com/builtbroken/common/science/units/ElectricUnit.java
+++ b/src/com/builtbroken/common/science/units/ElectricUnit.java
@@ -1,5 +1,8 @@
 package com.builtbroken.common.science.units;
 
+/** Units of measure for work with electricity
+ *
+ * @author Robert Seifert */
 public enum ElectricUnit
 {
     AMPERE("Amp", "I"),
diff --git a/src/com/builtbroken/common/science/units/ForceUnit.java b/src/com/builtbroken/common/science/units/ForceUnit.java
index 5efa4152..daf06b82 100644
--- a/src/com/builtbroken/common/science/units/ForceUnit.java
+++ b/src/com/builtbroken/common/science/units/ForceUnit.java
@@ -1,6 +1,6 @@
 package com.builtbroken.common.science.units;
 
-/** Units of messure for force
+/** Units of measure for force
  *
  * @author Rsobert Seifert */
 public enum ForceUnit
diff --git a/src/com/builtbroken/common/science/units/ImperialUnits.java b/src/com/builtbroken/common/science/units/ImperialUnits.java
new file mode 100644
index 00000000..f97cd7c0
--- /dev/null
+++ b/src/com/builtbroken/common/science/units/ImperialUnits.java
@@ -0,0 +1,42 @@
+package com.builtbroken.common.science.units;
+
+/** @Source http://en.wikipedia.org/wiki/Imperial_units
+ * @author Robert Seifert */
+public enum ImperialUnits
+{
+    thou("thou", "th", (float) (1 / 12000)),
+    inch("inch", "in", (float) (1 / 12)),
+    foot("foot", "ft", 1),
+    yard("yard", "yd", 3),
+    chain("chain", "ch", 66),
+    furlong("furlong", "fur", 660),
+    mile("mile", "mi", 5280),
+
+    /** Not official used anymore */
+    league("league", "lea", 15840),
+
+    /** Maritime units */
+    fathom("fathom", "ftm", 6.08f),
+    /** Maritime units */
+    cable("cable", "", 608),
+    /** Maritime units */
+    nautical("nautical mile", "", 6080),
+
+    /** Gunter's sruvey unit */
+    link("link", "", (float) (66 / 100)),
+    /** Gunter's sruvey unit */
+    rod("rod", "", (float) (66 / 4));
+
+    public String name, symbol;
+    float toFeet;
+
+    public static final ImperialUnits[] mainUnits = { inch, foot, yard, mile };
+
+    private ImperialUnits(String name, String symbol, float toFeet)
+    {
+        this.name = name;
+        this.symbol = symbol;
+        this.toFeet = toFeet;
+    }
+
+}
diff --git a/src/com/builtbroken/common/science/units/MetricUnit.java b/src/com/builtbroken/common/science/units/MetricUnit.java
index 8cc6d10c..51adde94 100644
--- a/src/com/builtbroken/common/science/units/MetricUnit.java
+++ b/src/com/builtbroken/common/science/units/MetricUnit.java
@@ -1,5 +1,8 @@
 package com.builtbroken.common.science.units;
 
+/** Metric measurement system units
+ *
+ * @author Robert Seifert */
 public enum MetricUnit
 {
     MICRO("Micro", "u", 0.000001f),
diff --git a/src/com/builtbroken/common/science/units/TemperatureUnit.java b/src/com/builtbroken/common/science/units/TemperatureUnit.java
index 82b2c835..0c28f53e 100644
--- a/src/com/builtbroken/common/science/units/TemperatureUnit.java
+++ b/src/com/builtbroken/common/science/units/TemperatureUnit.java
@@ -1,5 +1,8 @@
 package com.builtbroken.common.science.units;
 
+/** Units of measure for temperature
+ *
+ * @author Robert Seifert */
 public enum TemperatureUnit
 {
     Fahrenheit("Fahrenheit", "F", new ITempConversion()
@@ -58,7 +61,6 @@ public enum TemperatureUnit
     public String name, symbol;
     public ITempConversion conversion;
 
-
     private TemperatureUnit(String name, String symbol, ITempConversion conversion)
     {
         this.name = name;
diff --git a/src/dark/core/common/debug/TileEntityInfFluid.java b/src/dark/core/common/debug/TileEntityInfFluid.java
index b151e468..5780ce2e 100644
--- a/src/dark/core/common/debug/TileEntityInfFluid.java
+++ b/src/dark/core/common/debug/TileEntityInfFluid.java
@@ -15,7 +15,7 @@ import net.minecraftforge.fluids.FluidTankInfo;
 import net.minecraftforge.fluids.IFluidHandler;
 import universalelectricity.core.vector.Vector3;
 
-import com.builtbroken.common.TextHelper.TextColor;
+import com.builtbroken.common.lang.TextHelper.TextColor;
 
 import dark.core.prefab.helpers.FluidHelper;