Itall depends on the size of "a closed container" as to how much water has to be added. Fingers just don't do in this case. Ina Ina Crossley Auckland New Zealand Zone 10 On 21/01/2013 2:12 p.m., arnold140@verizon.net wrote: > In a closed container length is volume. > > " insecticide is one finger Murphy's Soap, two > fingers isopropyl in up to a quart of water." > > Arnold