Sun method

A thin glass bowl is taken and almost filled with the purest water obtainable, if possible from a spring nearby, 

The blooms of the plant are picked and immediately floated on the surface of the water, so as to cover it, and then left in the bright sunshine for three or four hours, or less time if the blooms begin to show signs of fading. The blossoms are then carefully lifted out and the water poured into bottles so as to half fill them. The bottles are then filled up with brandy to preserve the remedy. These bottles are stock, and are not used direct for giving doses. A few drops are taken from these to another bottle, from which the patient is treated, so that the stocks contain a large supply. The supplies from the chemists should be used in the same way. 

Edward Bach Collected Works