Describe Geothermal Generator in guide

guide.lua

@@ -379,6 +379,34 @@ local pages={
 				<left>||Picture 1. Generator producing power from <item name="{{elementKeyCoal}}" height="{{ITEM_HEIGHT}}"> <b>Coal</b>||</left>
 			]]
 		}
+	},
+
+	{
+		name="geothermalGenerator",
+		title=S("Geothermal Generator"),
+		icon="industrialtest:geothermal_generator",
+		content={
+			[[
+				<big>||Geothermal Generator||</big>
+				<left>
+					||Geothermal Generator produces energy using heat from fluids like lava. Hot fluids can be transferred into Geothermal Generator for example by using <item name="industrialtest:empty_cell" height="{{ITEM_HEIGHT}}"> <b>Empty Cell</b> or <item name="{{elementKeyBucket}}" height="{{ITEM_HEIGHT}}"> <b>Empty Bucket</b>.||
+				</left>
+			]],
+			createMachineInformationTable({
+				{
+					name="outputVoltage",
+					value="LV"
+				},
+				{
+					name="powerCapacity",
+					value=string.format("%d EU",industrialtest.GeothermalGenerator.capacity)
+				}
+			},S("Geothermal Generator")),
+			[[
+				<img name="industrialtest_guide_geothermal_generator.png" width="{{IMAGE_WIDTH}}">
+				<left>||Picture 1. Geothermal Generator producing power from <b>Lava</b>||</left>
+			]]
+		}
 	}
 }
 
@@ -423,6 +451,7 @@ local function getGuideFormspec(playerName,pageName)
 			local content=preprocessHypertext(table.concat(page.content,""),{
 				IMAGE_WIDTH=550,
 				ITEM_HEIGHT=16,
+				elementKeyBucket=industrialtest.elementKeys.bucket,
 				elementKeyCoal=industrialtest.elementKeys.coal,
 				elementKeyIronIngot=industrialtest.elementKeys.ironIngot,
 				elementKeyRubber=industrialtest.elementKeys.rubber,