This is very simple and very tasty.
Crush 6 oz of raspberries, loganberries, or a mixture of both.
Put in a pan with 9 oz of sugar and stir well over moderate heat until sugar has melted, stirring to prevent sticking.
Bring to boil for one minute
Remove from heat.
Stir in 1 tablespoon of liquid pectin. Jar in usual way.
Result a 1lb jar of home-made jam.
cheers Penny