Strawberries are not very satisfactory to can, as they contain such a large percentage of water; therefore the best way to do them is to sprinkle sugar over them after they have been washed and the stalks removed, and leave overnight. Next day pack them carefully into clean jars, taking care not to crush them, and do not add any water. Adust the rubber rings and lids, put into steriliser, and bring very slowly to boiling point. By that time they would have shrunk considerably in the bottles in their own juice, so remove the jars and fill up from an extra bottle. Screw down the lids tightly and return to sterilise for five minutes.