Soak prepared cucumbers(we quartered lengthwise) in salt water and ice for three hours. The salt water should taste like sea water if you have it right. Keep water iced as this makes for crisper pickles. Put 1/4 head dill in each quart jar and pack the cucumbers tightly. Boil the brine and pour over cucumbers in jars. Seal. Place in pressure cooker and bring pressure up to 5#, then turn off. Rest jars on towels.