Demonstration 1: 3D-Magnetic field demonstrator 1. Shake the vessel slowly and gently to distribute the filings evenly. (Vigorous shaking may produce bubbles in the paraffin making it difficult to see the filings.) 2. Place one or more magnets into the demonstrator as shown in Figure 5. At first the filings will arrange themselves along the lines of the magnetic field, and then they will cluster around the magnetic poles. 3. Describe the patterns obtained. Make a draw of the magnetic field line