Originally, exactly as much as a volume of water equal to the cube of the hundredth part of the metre, at the temperature of melting ice. I don't find that terribly helpful. Not many did. That's why, in 1889, the mass of the kilogram was redefined as being equal to the IPK.
Boiling water is also an effective poison ivy killer. If the area where you will be killing poison ivy has no other plants you wish to keep, pour boiling water over the poison ivy plant. Boiling water will kill any part of a plant that it comes in contact with, so be careful using this around desirable plants.
Discover how to's using remedies such as oatmeal, vinegar, baking soda, and a few other surprisingly effective & soothing treatments whenever a poison ivy rash begins to drive you to distraction: 1  Oatmeal - Simply boil up the oatmeal in water as you normally would.