Most of us have seen the big helium-filled balloons at parades or other events but I’ve never seen how they get their lift. I came up from the train station downtown and found this. Those cylinders must be three by three or maybe four. I could not see an outlet and, try as I might. I could not see a connection point to the balloons themselves. Then there is the question of how the helium is produced and compressed into the tanks.
