These diagrams show that the bigger the circle or sphere, the more space in between.
Johnson, Roswell H. Principles of Oil and Gas Production (New York, NY: John Wiley & Sons, Inc., 1916)
1567×2400, 2.6 MiB
668×1024, 397.6 KiB
417×640, 169.3 KiB
208×320, 44.7 KiB