Abstract
Since about 1960 it has been known that a magnetic field affects streaming water in an unknown way. Such water does not settle calcareous and iron sediments and for this reason started to be used in kettles, boilers, and everywhere high-calcareous water occurs. Another property of this water found by the author in 1974 is plant-growth stimulation. In spite of many efforts, no significant difference between common and magnetically treated water was then found in its physical constants. Now the author has discovered that this water contains a small amount of hydrogen peroxide.