A Bunsen burner doesn't have a "gas supply burner," rather it's a device that burns gas. Here's how the gas gets to the burner:

1. Gas Source: The Bunsen burner is connected to a gas source, usually a natural gas line or a compressed gas cylinder.

2. Gas Valve: A valve on the burner controls the flow of gas from the source.

3. Gas Inlet: The gas enters the burner through a small inlet tube.

4. Jet: The gas then passes through a jet, which is a narrow opening that increases the velocity of the gas.

5. Mixing Chamber: The jet leads into a mixing chamber, where the gas is mixed with air.

6. Burner Head: The mixed gas and air travel up through the burner head and are ignited at the top.

So, the gas from the source is transported to the burner through a series of tubes and passages, culminating in a mixing chamber where it's combined with air before being ignited.

Let me know if you have any other questions about the Bunsen burner!