The invention demonstrated how simple mechanical principles could automate everyday tasks. One invention used a coin-operated mechanism to dispense a measured quantity of water. A coin dropped into the device would https://music.amazon.es/podcasts/69d3b9a8-ce50-4beb-8cef-e2712da6057e/episodes/a76ffe28-6efc-4ae7-a23f-f87f572fdab7/e39life