Peel the cucumbers, cut them into halves and remove the seeds. Dissolve the gelatin in a half cupful of hot water. Grate the flesh of the cucumbers; grate the apples, add them to the cucumbers, and add all the other ingredients. Freeze as you would ordinary sherbet.
Serve in tiny glasses, with boiled cod or halibut.
This will fill eight small stem glasses.
Ice Creams, Water Ices, Frozen Puddings.