Mrs. Beeton, The Book of Household Management
“ JELLIES are not the nourishing food they were at one time considered to be, and many eminent physicians are of opinion that they are less digestible than the flesh, or muscular part of animals; still, when acidulated with lemon-juice and flavoured with wine, they are very suitable for some convalescents. Vegetable jelly is a distinct principle, existing in fruits, which possesses the property of gelatinizing when boiled and cooled ”
