Update analogue.md

Author: MarcScott

analogue.md

@@ -22,7 +22,7 @@ The analogue values are communicated to the Pi using the SPI protocol. While thi
 
 The MCP3008 is an ADC providing eight input channels. The eight connectors on one side are connected to the Pi's GPIO pins, and the other eight are available to connect analogue input devices to read their values.
 
-Place the MCP3008 chip on a breadboard and carefully wire it up as shown in the following diagram. You should see a small notch, or dot, in one end of the chip. In the diagram, this end of the chip is alligned with column *19* on the breadboard.
+Place the MCP3008 chip on a breadboard and carefully wire it up as shown in the following diagram. You should see a small notch, or dot, in one end of the chip. In the diagram, this end of the chip is alligned with column **19** on the breadboard.
 
 ![MCP3008 wiring](images/mcp3008.png)